On Wednesday, August 12, 2026, the yield on the 30-year U.S. Treasury note neared 5.33%, its highest level since 2007. Shortly after the U.S. Treasury announced it would double its purchases of long-term securities and conduct so-called buybacks, the yield fell sharply to about 5.19%. The government sought to stem the rise in rates with an emergency measure. The debate immediately focused on the effects of this surge: such a high risk-free yield can put pressure on stocks, especially growth and tech stocks, at a time when the AI boom is relying heavily on private capital.
Impact on the bond market
In recent days, we have witnessed a veritable global sell-off of government bonds. Long-term yields have skyrocketed: the 30-year Treasury briefly surpassed 5.33% (a high not seen since 2007), and the 10-year yield approached 4.75%. This bearish wave has spread across the globe: even Japan saw its 10-year yields climb above 1.2%, a high not seen in over a decade. On the macro front, the surge in Brent crude, which returned to around $91 per barrel, a three-week high, fueled numerous inflationary concerns, triggering an even stronger-than-usual rush into Treasuries as a hedge. At the same time, geopolitical fears, particularly regarding U.S.-Iran tensions and the standoff off the Strait of Hormuz, have contributed to the sharp rise in crude oil prices.
The combination of high potential inflation and a large supply of debt has thus driven yields higher: the market is pricing in higher rates as a countermeasure to upward pressure on prices.
Numerous economic factors explain the rally in yields. First and foremost, public debt and deficits: the U.S. Treasury is managing a growing debt of nearly $40,000 billion and federal budgets with annual deficits of around 5–6% of GDP. To finance these needs, the government issues large quantities of government bonds. This year, the total volume of issuances has been excessive, to the point that even public offerings (10- and 30-year bonds) required high yields to be absorbed. As analysts explain, the growing supply of bonds pushes prices down and yields up: “Investors are demanding a higher yield to compensate for the rise in the deficit and debt.”
Inflationary pressures are another driving force: the U.S. economy is showing signs of resilient growth, and although inflation is moderate, it remains well above the Fed’s 2% target, even though rising energy prices are prompting investors to price in further rate hikes.
Nor should the private sector’s demand for capital be underestimated; large technology companies are issuing bonds in record quantities to finance massive investments in data centers and artificial intelligence projects. According to Dealogic, tech companies placed over $428 billion in bonds in 2025. Some describe this phenomenon as a “flood” of AI-oriented issuances in the credit markets: the more corporate bonds are sold, the more investors allocate capital to companies rather than government bonds. This increased competition for investment capital can weaken relative demand for Treasuries, helping to drive yields higher.
The Relationship Between Treasury Bonds, Interest Rates, and AI
The rise in risk-free rates has a direct impact on stock valuations: when the risk-free rate rises, so does the rate at which future cash flows are discounted. This reduces the present value of a company’s expected earnings, especially for “growth” companies whose value depends heavily on revenues that lie far in the future. A striking example is the Nasdaq tech sector, which has recently suffered sharp declines just as yields were rising. The Nasdaq 100, composed of the largest and most innovation-driven companies, fell by more than 2% in one of the most recent trading sessions. The reason, as reported by Wall Street news outlets, is growing concern over the enormous capital expenditures associated with AI projects: if billions are needed to build data centers and chips, and bond yields are rising in the meantime, investors are reassessing the risk-return profile of tech stocks.
In general, “value” stocks or traditional sectors are less affected by this effect than tech stocks, because their future earnings are more certain or closer in time. But if the risk-free rate rises for economic or fiscal reasons, the stock market can also suffer, making it clear that higher yields reduce the present value of future profits. However, analysts also estimate that if this rise reflects an expanding economy and thus rising earnings, the damage to stocks could be more limited. At the moment, with bond prices falling rapidly, Wall Street finds itself having to compete with fixed income: many investors are wondering whether it’s still worth betting on growth stocks rather than parking capital in government bonds.
The race toward artificial intelligence is one of the main drivers of demand for capital, affecting both equity and debt. Major tech companies have planned investments totaling tens of billions per year in AI infrastructure. To finance these plans, many have chosen to take on debt: even with debt levels remaining low until recently, they are turning to the bond market to quickly raise enormous sums. Despite solid balance sheets, bond issuance has reached record levels: consider that, in 2025 alone, tech companies issued $428 billion in bonds.
This explosion in the supply of corporate bonds in the tech sector not only increases competition for capital with the government but also raises questions about financial sustainability. Rising yields directly affect these companies’ refinancing costs: those looking to issue new corporate bonds must offer a higher yield than Treasuries, which tends to rise if markets fear excessive corporate leverage or a slowdown in future revenue. Already, some reports highlight that Big Tech’s total debt is growing faster than its profits.
The potential domino effect is that, if government bond yields rise and corporate bond yields also rise, AI investment plans could become more expensive. Some of the leading hedge funds and analysts are pointing out that extraordinary spending on AI is putting pressure on corporate balance sheets. On Wall Street, there has already been a sell-off in stocks such as those in the semiconductor and cloud infrastructure sectors, partly due to expectations of a slowdown in the flow of new capital from investors.
The Role of U.S. Public Debt
The U.S. debt portfolio is currently in the spotlight. The U.S. Treasury is forced to refinance a record volume of debt, against the backdrop of a national debt that has now reached $40,000 billion, with long-term annual deficits remaining at historic highs. Market participants are talking about a rising fiscal risk premium demanded by the markets: so much new money to be placed in a short period of time naturally pushes yields higher.
The key concept is the term premium, the extra return investors demand for holding very long-term debt. With such an unbalanced federal budget, the term premium has risen significantly, meaning that the patience of long-term investors wears thin more quickly if they see debt piling up without spending cuts or tax increases. In fact, some strategists note that the Treasury is trying to alleviate this problem by shifting its focus to short-term securities: increasing the issuance of bills with maturities of just a few months allows for cheaper short-term financing, but it does not solve the underlying problem. So far, despite the tensions, there has been no real “rebellion” by the so-called bond vigilantes, those large investors who boycott government bonds to punish expansionary fiscal policy. Data from the latest auctions show that demand remains solid, even if the bid prices are lower than in the past.
In response to the rapid rise in interest rates, the U.S. Treasury Department intervened directly in the market. Specifically, it announced an increase from $2 billion to $4 billion in the amount allocated to each of its buyback operations for long-term securities. These operations involve the voluntary repurchase of outstanding bonds (primarily those with maturities of 10 to 30 years), with the aim of reducing net supply in the market. The announcement had an immediate effect: the yield on the 30-year bond fell by nearly 10 basis points to 5.188% shortly thereafter, reflecting expectations of less supply-side pressure.
Analysts interpret this move as a strong signal from the Treasury. According to Ryan Swift of BCA Research, the intervention had two effects. The first is purely a policy signal: demonstrating responsiveness to rising rates triggers a psychological calming effect on the markets. The second is more technical in nature: by financing a larger portion of the deficit through short-term securities, selling T-bills rather than long-term bonds, the Treasury temporarily shifts the yield curve higher in the short term than in the long term. In other words, the current buybacks amount to a net reduction in the issuance of 10- to 30-year securities in favor of those with maturities of just a few months.
However, certain limitations regarding this operation must be taken into account, as this tool is only effective on a temporary basis: Treasury bills can adjust the maturity profile, but they cannot eliminate the underlying funding need. If short-term rates were to rise too much due to unexpected inflationary pressures or investor aversion to T-bills, the market would not allow an excessive shift in funding costs, and at some point, the Treasury would be forced to resume issuing long-term notes. It is highly likely that the only entity with truly unlimited purchasing power would be the Federal Reserve itself, but the Fed’s current trend is to shrink its balance sheet rather than expand it, further complicating the situation.
The Future
The near future of the markets will depend largely on monetary policy and geopolitics: right now, Wall Street is focused on the minutes from the Fed’s late-July meeting. Investors will want to know how concerned central bankers are about persistent inflation or, conversely, about an economic slowdown. If new signals emerge pointing toward future rate hikes, yields could rise further, intensifying pressure on stock prices. Conversely, signs of moderation or a wait-and-see approach, perhaps because macroeconomic data shows the economy is cooling, could ease yields, paving the way for a partial recovery in stocks.
If commodity prices were to fall due to a diplomatic agreement in the Middle East that truly reopens the Strait of Hormuz, and inflation were to return to around 2–3% annually, Treasuries would no longer be in such high demand as a safe haven. In that case, long-term rates would decline, and stock valuations could rebound. Some observers note that, in the past, a rise in yields accompanied by economic growth has had little negative impact on stocks, but if international conflict were to escalate or if the Treasury were to face a fiscal shock with midterm elections that do not result in restrictive measures, the backlash would likely push rates higher. In this scenario, long-term bonds would remain attractive relative to stocks, and valuations of growth stocks would come under further pressure.
Conclusions
The rise in Treasury yields to nearly 20-year highs is changing the landscape for Wall Street. The yield on the 30-year bond has climbed to around 5.3%, and that on the 10-year bond to 4.7%, while public debt, the deficit, oil prices, and inflation continue to put pressure on yields.
For growth and tech stocks, the problem is clear: higher interest rates make valuations based on future earnings less attractive and increase the cost of capital. This issue also affects artificial intelligence, where major tech companies continue to invest enormous sums in data centers, chips, and energy.
The Treasury can intervene through auctions, maturity management, and buybacks, but it cannot eliminate the problem of the U.S.’s enormous financing needs. Meanwhile, the Fed maintains a cautious stance in the face of inflationary risks.
The key issue for the markets will be determining whether the 30-year Treasury yield above 5% represents a temporary peak or a new normal. In the latter case, Wall Street could enter a phase of greater stock selection, with pressure falling primarily on companies with higher valuations and greater reliance on capital. For the tech sector and AI, therefore, the cost of capital could become just as important as earnings growth.
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