Summary

• US technology companies are increasing their use of European bond markets to finance AI infrastructure, with Alphabet launching another euro-denominated offering on 2 November.
• BNP Paribas forecasts that net euro investment-grade corporate bond supply will rise from €105 billion in 2026 to €192 billion in 2027.
• Larger offerings could increase credit spreads and affect other borrowers, although the eventual impact depends on investor demand and wider market conditions.

American technology companies are increasingly raising debt through European bond markets to finance artificial intelligence infrastructure, adding to the competition for investors’ capital as European businesses and governments seek funding for their own investment programmes.

Alphabet launched its second euro-denominated bond offering of 2026 on 2 November, following a €9 billion transaction in May. Investors expect other major technology companies, including Meta, Amazon, and Microsoft, to consider further borrowing outside the United States as their data centre and computing expenditure increases.

Market participants estimate that between €40 billion and €60 billion of additional technology-related issuance is in preparation. BNP Paribas forecasts that net supply of euro-denominated investment-grade corporate bonds could rise by 83% in 2027, from €105 billion this year to €192 billion.

Those estimates are forecasts rather than confirmed issuance commitments. The amount ultimately borrowed will depend on investment plans, market conditions, and the financing terms available when companies approach investors.

Computing investment reaches the debt market

Developing AI infrastructure requires substantial expenditure before the resulting services generate revenue. Data centres need buildings, electricity infrastructure, cooling, networking equipment, servers, and specialist processors, with the most advanced computing installations involving particularly expensive hardware.

Large technology companies have traditionally financed much of their investment through operating cash flow. Their existing advertising, software, and cloud businesses can generate substantial revenue, providing resources for infrastructure development without relying entirely on external finance.

However, the scale of planned AI expenditure is creating additional demand for capital. Borrowing allows companies to fund investment while retaining cash for operating requirements, acquisitions, shareholder distributions, or other corporate purposes.

International bond markets offer several financing options. Rather than issuing debt only in US dollars, companies can sell bonds denominated in euros, sterling, or Swiss francs, potentially reaching investors whose portfolios and obligations are concentrated in those currencies.

Such transactions can also help companies manage the relationship between their financing and expenditure in different markets. The economic advantage depends on borrowing costs, currency arrangements, and the terms available at the time of issuance.

US companies issuing bonds in foreign currencies are often described as reverse Yankee borrowers. Their presence in European credit markets is established, but the scale associated with AI investment is drawing additional attention to how the market can accommodate large transactions.

Issuance forecasts point to a substantial increase

LSEG data cited in the latest market analysis shows that technology-related debt issuance in the United States has exceeded $250 billion during 2026, an increase of approximately 81% from the corresponding period last year.

European technology-related issuance stood at $39.3 billion, up around 5% year on year. These figures are reported in dollars for regional comparison and should not be confused with the narrower total of bonds issued specifically in euros.

Although Europe’s current volume remains smaller than that of the United States, large international borrowers have considerable capacity to increase activity if they find European financing conditions attractive.

BNP Paribas expects US corporate issuers to account for approximately €80 billion to €90 billion of the projected €192 billion in net euro investment-grade supply during 2027, with major cloud and AI infrastructure companies representing a substantial share.

These transactions can arrive in several tranches with different repayment dates. A borrower might offer shorter and longer maturity bonds simultaneously, allowing investors to choose the duration of the lending commitment they are prepared to make.

Large multi-tranche offerings can attract substantial demand, but they also require investors to allocate capital to one issuer or a relatively concentrated group of businesses.

Where several major borrowers enter the market close together, some investment funds may reach limits on their exposure to individual companies or sectors. Those constraints can influence the price borrowers need to offer to complete their financing.

Competition can influence borrowing costs

The interest rate a company pays on newly issued debt depends partly on market benchmark yields and partly on the additional compensation investors require for lending to that particular borrower.

This additional compensation is reflected in a credit spread. If bond supply grows faster than investor demand, issuers may need to offer higher yields, widening spreads and increasing financing costs.

European companies outside the technology sector could be affected because investment-grade funds also purchase debt issued by utilities, telecommunications businesses, manufacturers, and other established borrowers.

These businesses may need significant long-term capital for electricity infrastructure, industrial equipment, networks, or other assets. A larger flow of highly rated technology bonds can influence how investors allocate money between those opportunities.

However, increased issuance does not automatically produce higher borrowing costs. Strong demand can absorb additional securities, while changes in central bank expectations, inflation, economic growth, and government bond markets also influence corporate yields.

The relevant outcome depends on the relationship between supply and demand when individual transactions take place. Some borrowers may face higher credit spreads, while others could continue to obtain attractive financing because of their financial position or the characteristics of their bonds.

Investors have also observed some European companies favouring shorter maturities amid changing market conditions. This can reduce the immediate cost of locking in long-term financing, but it introduces the need to refinance sooner.

For businesses funding assets that will operate for decades, the appropriate financing structure depends on expected cash flow, repayment schedules, and the risks associated with future interest rates.

ECB researchers identify concentration risks

An August analysis published on the European Central Bank’s website examined how growing US technology borrowing could affect euro-area credit markets.

The researchers estimated that major US technology companies had approximately €40 billion of euro-denominated bonds outstanding. Although that represented a relatively small share of the existing corporate bond market, the companies accounted for almost 10% of new euro-denominated issuance by non-financial businesses.

The analysis identified potential concentration effects as investment funds increase their exposure to a small group of technology companies. Funds tracking bond indices may also acquire more of those issuers’ debt as their representation in benchmarks grows.

Such changes could influence the amount of capital available for other borrowers, particularly where investors maintain limits on individual sectors or securities.

The researchers also examined the possibility that investors may underestimate risks associated with rapid increases in technology borrowing. The financial strength of established technology companies can support large bond offerings, but future returns from AI infrastructure remain subject to commercial demand, equipment costs, and operating performance.

Higher investment does not guarantee that the resulting computing facilities will earn sufficient revenue to justify their cost. Borrowers therefore need to balance infrastructure expansion with the obligations associated with servicing additional debt.

The analysis represents research by its authors and does not necessarily express the ECB’s official policy position.

European governments face indirect effects

Government securities may also encounter competition where investors can obtain additional yield from highly rated corporate bonds.

The markets are different, and sovereign yields respond to fiscal conditions, inflation expectations, central bank policy, and other factors. Nevertheless, large changes in corporate bond supply can influence portfolio allocations across fixed-income assets.

European markets may benefit from attracting major international issuers, which can increase the range of securities available and support trading activity. The corresponding challenge is accommodating that demand without materially restricting financing opportunities for other sectors.

The scale of planned AI expenditure makes the question increasingly relevant to European investment. Electricity networks, industrial facilities, transport infrastructure, and computing projects all compete for capital, although their risks and financing structures differ.

Alphabet’s latest offering provides another example of technology infrastructure spending drawing on European investors. The extent of further issuance during 2027, and the yields required to attract buyers, will indicate how comfortably the market can support the expanding financing requirements.