AI's Growing Debt Appetite: Why This Time May Be Different

USD investment-grade bond issuance has topped $1.5 trillion in 2026, with 20 jumbo deals worth $384 billion driving much of the pace. Technology companies have accounted for roughly 60% of jumbo issuance since 2025, concentrating credit exposure at longer average maturities of 14.2 years. The WisdomTree U.S. Corporate Bond Fund (QIG) maintains an underweight to Technology, including less exposure to higher-risk issuers such as Oracle, versus the benchmark.

Corporate bond issuance has been on a tear in 2026, led by the U.S. dollar investment-grade (IG) market. USD IG issuance has already topped $1.5 trillion this year, putting 2026 on track to surpass the pandemic-era record. A notable share of this year’s supply has come from “jumbo” deals (deals with $10 billion or more of proceeds at announcement). So far this year, there have been 20 separate jumbo USD IG deals, representing a combined $384 billion of issuance. This builds on the momentum we saw in 2025 and has important implications for investors, particularly when it comes to sector concentration, the timing of new issuance and interest-rate risk.

One sector stands out: Technology. Technology companies have accounted for roughly 60% of jumbo USD IG issuance across full-year 2025 and year-to-date 2026. The sector also represents more than 20% of all USD IG new issuance, including both jumbo and smaller deals. That level of issuance is significant because it can gradually change the composition of the broader corporate bond market. As Technology companies issue more debt, investors who track broad IG benchmarks may find themselves with greater exposure to the sector than they previously had. In other words, the surge in supply isn’t just changing the size of the market. It’s also changing where some of the market’s credit exposure is concentrated.

Historically, jumbo debt deals have tended to fall into two categories: those used to finance acquisitions and those issued for other corporate purposes. This year, acquisition-related financing accounts for just 11% of jumbo issuance, down from 24% in 2025, 62% in 2024 and 83% in 2023. Why does that matter for investors? M&A-related debt issuance is generally easier to anticipate. Acquisition announcements typically give investors advance notice, with a general lead time of about five months, that a large financing package may be coming. Management teams also tend to provide details about the combined company’s expected capital structure, giving investors time to assess pro forma leverage and other credit metrics before the bonds are issued. With a much smaller share of this year’s jumbo issuance tied to M&A, investors have had less advance warning about when large deals may come to market. That makes monitoring potential issuance, and understanding how it could affect portfolio exposures, increasingly important.

There is another important feature of this year’s Technology issuance: maturity. Technology bonds issued this year have a weighted average maturity of 14.2 years, approximately 3.5 years longer than the broader USD IG market. Among the five hyperscalers responsible for much of the new supply, the average maturity extends to 16.5 years. As a result, the market is not only seeing greater concentration in Technology but also seeing that exposure added further out on the yield curve. That matters because longer-maturity bonds tend to be more sensitive to changes in interest rates. When yields rise, longer-...