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US tech firms may crowd out others in euro bond market and raise credit risk

Published by Global Banking & Finance Review

Posted on September 2, 2026

2 min read

· Last updated: September 2, 2026

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US Tech Firms Flood Euro Bond Market, Raising Credit Risks and Borrowing Costs

Impact of US Tech Giants on Euro Zone Bond Markets

Surge in AI-Driven Investments and Debt Issuance

FRANKFURT, Sept 2 (Reuters) - U.S. tech giants are flooding the euro zone bond market to fund huge AI investments, potentially crowding out other borrowers, pushing up financing costs even for governments and raising credit risks, according to a European Central Bank blog post.

Tech firms such as Google, Amazon and Microsoft, often referred to as hyperscalers, could spend as much as $1 trillion on AI-related investments by 2028, credit analysts say, forcing them to tap debt markets around the world.

Market Share and Issuance Trends

The firms have about €40 billion ($46 billion) of bonds outstanding in the euro zone, a relatively small share of the market, but account for nearly 10% of gross new issuance. Amazon and Alphabet have been the largest corporate issuers in the euro zone bond market this year.

Potential Effects on Borrowing Costs and Credit Risks

"U.S. big tech companies could push up borrowing costs for all sectors as they accumulate debt and account for a growing share of bond markets, with a potential spillover to the sovereign and supranational segment of the bond market," the blog, which does not necessarily reflect the ECB's views, said.

The volume of new debt issued by big tech firms could test investor appetite, while expectations of even greater bond supply may amplify this effect, potentially lifting borrowing costs across the market. The impact could be especially pronounced given limits on how much debt investors can absorb.

Investor Behavior and Market Dynamics

Tech firms may also crowd out other issuers as passive investors that track bond benchmarks automatically increase their holdings of the sector, putting additional pressure on competing bonds and influencing spreads.

Credit Ratings and Risk Assessment

The blog's authors also argued that the relatively high credit ratings assigned to big tech debt may prove overly optimistic.

"The way rating agencies approach this sector may be based on assumptions on future revenue growth and leverage which may not stand the test of time, heightening the vulnerability to mispricing of credit risk," the blog said.

Additional Information

($1 = 0.8636 euros)

(Reporting by Balazs Koranyi; Editing by Mark Potter)

Key Takeaways

  • US hyperscalers are issuing €40 billion in euro‑denominated bonds—about 10% of new issuance—driven by AI investment needs projected to exceed $1 trillion by 2028 (ecb.europa.eu)
  • The surge in big‑tech issuance may strain investor appetite, elevate borrowing costs for other issuers—including sovereigns—and raise credit‑risk mispricing concerns given optimistic ratings (ecb.europa.eu)
  • Euro area investors such as pension funds and insurers have increased holdings of hyperscaler debt—accounting for 15% of the growth in euro‑denominated corporate bond holdings to March 2026—intensifying crowd‑out and index‑rebalancing pressures (euobserver.com)

References

Frequently Asked Questions

Why are US tech firms increasing their presence in the euro bond market?
US tech giants are raising funds in the euro bond market to finance major AI-related investments, estimated to reach $1 trillion by 2028.
How could US tech issuance affect other borrowers?
Large-scale bond issuance by tech firms may crowd out other borrowers and push up financing costs, even for governments.
What is the potential impact on credit risk in the euro bond market?
The influx of big tech debt could increase credit risk as credit ratings may be overly optimistic based on growth and leverage assumptions.
Which US tech firms are the biggest issuers in the euro bond market?
Amazon and Alphabet have been the largest corporate issuers in the euro zone bond market this year.
What concerns does the ECB blog raise about bond market dynamics?
The ECB blog warns that increased supply from tech firms could strain investor appetite and amplify borrowing costs market-wide.

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