The national debt crossed an unwelcome milestone: $40 trillion. It took the United States almost 200 years to register its first trillion. These days, it takes about 90 days to accumulate a trillion bucks. Nobody is surprised anymore, and perhaps the public will continue to shrug in a few years when America hits $50 trillion. To echo former Federal Reserve Chair Jerome Powell, this is entirely unsustainable – and the bond market agrees.

Treasury Intervenes in Bond Market

Short- and long-term Treasury yields have been rising across the US bond market since the war in Iran began in late February. The 30-year yield topped 5.31% for the first time since June 2007. The benchmark ten-year yield is the highest it has been since early 2025, while the two-year is flirting with 4.2%.

Market watchers have presented theories to understand what is happening. Investors could be losing sleep over the deteriorating fiscal picture. Traders might be worried about persistent war-driven inflation. Others could be noticing that Uncle Sam is competing with artificial intelligence (AI) for capital as corporate debt issuance rockets.

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Whatever the case, the Treasury Department could no longer sit idly by. On August 19, officials announced that it would increase its government debt repurchases to at least $4 billion, beginning next month, up from the current $2 billion schedule. The decision soothed the bond market, sending long-dated yields sharply lower.

A day later, yields began climbing again. Treasury Secretary Scott Bessent – perhaps in a moment of panic – told CNBC that the debt buybacks could exceed $4 billion.

“We’re going to increase the size of the buyback. I would note that it could be more than the 4 billion per issue," Bessent said. "We’ll see what the conditions are, and you know we will analyze them. All we’re trying to do is get people to focus on the fundamentals and not trade the headlines during a quiet period in a thin market.”

Bessent indicated that he is not concerned. The latest action is more about lifting demand for long-dated securities at a time when “people have nothing to do” in August. “We have a big toolkit, so we’ll see,” he added. “Part of it is signaling here and to show that we believe that the yields don’t reflect the underlying fundamentals.”

The current administration has been on a debt buyback binge over the last year. In the first half of 2026, the federal government repurchased a record $200 billion in debt. This campaign has mainly involved buying back long-term bonds and replacing them with short-term Treasury securities to reduce long-run borrowing costs and bolster overall market liquidity. In other words, Washington is buying time and hoping interest rates will tank.

Beam Uncle Sam Up, Scottie

A chorus of market watchers suggests that this is just reshuffling the deck chairs on a sinking Titanic. It is merely a band-aid solution that kicks the can down the road, similar to what occurred in the USD/JPY currency pair: stabilized conditions for a bit, then revved back up faster than you can say Abenomics.

A $2 trillion budget deficit, $40 trillion national debt, $1 trillion in annual interest payments, and $100 trillion in unfunded liabilities and expenditures. If bond market investors are panicking, the question should be: Why aren’t interest rates higher? Indeed, the timing of the surge in yields is worth noting.

In the months leading up to the war in Iran, Treasury yields had been trending lower. Then, when the United States and Israel launched a joint operation in the Middle East, they began their ascent. So, traders could be worried about ongoing inflation challenges and the Federal Reserve's continued failure to meet its 2% target.

Others believe this could be a case of normalization rather than a collapse in the bond market. In the 1990s, when the federal government was on a much better fiscal footing, the 30-year bond was firmly above 5% – and the stock market was booming. Similar conditions and themes are unfolding today, be it a tech boom or a deliberative Fed.

After years of ultra-low interest rates and a quieter Federal Reserve, the market could be catching up to the times. Or perhaps it is a case of the simplest explanation being the best. It is August. The big boys and gals of Wall Street are on vacation. College kids are taking breaks from Robinhood to settle in on campus. Retail is dreading the summer’s end. Put simply, trading volumes are thin, and they could reignite come September.

Pass the Fixed Income

The bond market had been a boring corner of finance, especially since the aftermath of the Great Recession. Real (inflation-adjusted) yields were zero or even negative. Today, however, Treasury securities are all the rage because of the handsome returns, whether you are holding a one-month T-bill or a 20-year bond.

Once again, Bessent finds himself in the midst of another chaotic event, proving himself to be the most consequential Treasury secretary in modern US history.