The cost of borrowing, after accounting for inflation, is climbing to levels not seen in nearly two decades. A wave of debt issuance from governments and technology giants—much of it tied to artificial intelligence—has pushed US 30-year real yields close to 3%, according to Reuters. That's the highest level in about 18 years.
Real yields matter because they strip out inflation, giving investors a clearer picture of the actual return they earn on bonds. When real yields rise, it signals that lenders are demanding more compensation for the risk of holding long-term debt. For everyday investors, this trend has ripple effects across stocks, bonds, and even mortgage rates.
Why are real yields rising?
The main driver is a flood of new debt. Governments, particularly the US, are issuing large amounts of long-term bonds to fund deficits. At the same time, Big Tech companies are borrowing heavily to finance massive AI infrastructure projects—data centers, chips, and energy systems. This surge in supply is pushing up yields, as investors require higher returns to absorb all the new paper.
Inflation expectations have also cooled recently, which makes the rise in nominal yields even more striking. When inflation expectations fall but nominal yields stay elevated, real yields climb. That's exactly what's happening now. As July CPI data cooled rate-hike bets, nominal yields eased somewhat, but the underlying supply pressure remains.
The 30-year real yield is a key benchmark for long-term borrowing costs. It influences everything from corporate bonds to home mortgages. When it rises, it becomes more expensive for businesses and households to borrow, which can slow economic activity.
What this means for investors
For bond investors, higher real yields are a double-edged sword. On one hand, they mean better returns on newly issued bonds. On the other, they depress the prices of existing bonds, which lose value as yields rise. If you hold long-term bonds or bond funds, you may see paper losses in the short term.
For stock investors, rising real yields can be a headwind. Higher borrowing costs squeeze corporate profits and make future earnings less valuable in today's dollars. Growth stocks, especially in tech, are particularly sensitive because their valuations rely heavily on expected future cash flows. As real yields climb, those future earnings are discounted more heavily, which can drag on share prices.
That said, not all sectors suffer equally. Financials, for example, often benefit from steeper yield curves, as banks can earn more on the spread between what they pay depositors and what they charge borrowers. Meanwhile, sectors like utilities and real estate, which are bond-like in nature, tend to struggle when real yields rise.
Broader market context
The move in real yields comes amid a backdrop of resilient economic data and shifting central bank expectations. Producer prices staying flat recently helped calm inflation worries, but the bond market is still grappling with the sheer volume of supply.
Geopolitical tensions, such as Hormuz tensions keeping oil near $88, add another layer of uncertainty. Higher energy prices can feed into inflation, which would push nominal yields even higher. However, so far, European stocks have defied war fears, suggesting markets are still in a risk-on mood.
For now, the key question is whether this supply wave will continue. With AI investment showing no signs of slowing, and governments still running large deficits, the pressure on real yields may persist. That could mean higher borrowing costs for years to come.
What to watch next
Investors should keep an eye on upcoming Treasury auctions, which will test demand for long-term debt. If buyers balk, yields could spike further. Also watch inflation data—if it surprises to the upside, real yields might not climb as much, but nominal yields could jump.
For the average investor, the takeaway is to be aware of how rising real yields affect your portfolio. Diversification across asset classes—including short-duration bonds, which are less sensitive to yield moves—can help manage risk. But as always, it's about your own time horizon and risk tolerance, not chasing short-term moves.
In short, the AI-driven borrowing boom is reshaping the bond market, and the effects are being felt far beyond Wall Street. Understanding real yields is a crucial step in navigating this new landscape.
