Major US technology companies are increasingly turning to European bond markets to help finance large-scale artificial intelligence (AI) investments. That shift is expanding the supply of corporate bonds denominated in euros, British pounds and Swiss francs, and market participants warn it could push up borrowing costs for other companies and governments.
Recent developments
Alphabet launched its second euro-denominated bond issuance of the year on Monday, after already raising €9 billion in May. Investors expect other tech giants — including Meta, Amazon and Microsoft — to step up borrowing outside the United States to fund their AI infrastructure projects.
How large could the issuance wave be?
Marion Le Morhedec, investment director for bond investments at Fidelity International, said Europe has lagged the US in technology-sector bond issuance but that a significant acceleration may now be under way. She estimates €40–60 billion of bond deals are currently in preparation. According to LSEG data, more than $250 billion of tech-linked bonds have been issued in US markets year-to-date, an 81% increase over the same period last year, while issuance in Europe totaled $39.3 billion, roughly a 5% year-on-year rise.
BNP Paribas projects that net supply of euro-denominated investment-grade corporate bonds could rise 83% to €192 billion ($214 billion) in 2027 from €105 billion this year. Giulio Baratta, global co-head of investment-grade bond financing at BNP Paribas, said reverse Yankee issuance — US corporates issuing in foreign markets — could account for about €80–90 billion of total supply in 2027, largely driven by the biggest tech companies.
Why Europe is attractive to issuers
Issuing bonds in foreign currencies lets companies reduce currency exposure on global assets while tapping relatively cheaper financing available in deep, liquid European capital markets.
Market effects: spreads and yield pressure
A large inflow of new issuance has a twofold effect: it increases the availability of investment-grade corporate bonds for investors, but it can also raise borrowing costs for other European corporates and sovereigns. Market data show the ICE BofA Euro Investment Grade asset-swap spreads rose by 11 basis points last month, indicating investors now demand greater compensation for holding corporate bonds versus interest rate swaps.
Analysts say issuers will likely have to offer higher yields to attract sufficient demand, which would raise financing costs for other borrowers. European investors are also generally less experienced at absorbing the multi-tranche, multi-maturity jumbo deals that are more common in the US.
Shift toward shorter maturities
So far strong investor demand has absorbed the rising supply, but analysts warn that a string of €10–20 billion mega-issues could seriously test the market, particularly if several companies issue at the same time. In response, some European issuers are opting for shorter maturities: Christian Hantel, a portfolio manager at Vontobel, said issuers outside the tech giants are avoiding the long end and increasingly choosing five- to seven-year tenors instead of the previously common ten-year notes.
Spillover to government bond markets and policy reaction
Additional corporate issuance could also put pressure on sovereign bond markets, which are already sensitive to fiscal and inflation concerns. Christine Lagarde, president of the European Central Bank, recently noted that tech giants' bond issuances have contributed to higher government bond yields.
Market participants are watching closely how much AI-related, long-dated issuance hits the market and what the implications for sovereign yields might be — Owen observed. Tech companies' bonds generally carry high credit quality while offering yields above government paper, creating competition for investor cash.
Conclusion
The surge in US tech companies' issuance in European markets is expanding the supply of investment-grade corporate bonds and could push yields higher, testing investor demand for large, multi-tranche deals. The ultimate impact on other corporate and sovereign borrowing costs will depend on the volume, maturity mix and timing of the issuance wave.
