In a new blog post, the European Central Bank examines how US technology hyperscalers are using the euro area corporate bond market to finance artificial intelligence investment. It finds that their issuance has so far broadened the market through longer maturities, greater technology-sector exposure and higher-rated debt, with limited spillovers to other corporate issuers’ funding access or investor portfolios. Hyperscalers have about EUR 40 billion of euro-denominated bonds outstanding, representing slightly more than 1% of benchmark corporate bond indices. They now account for nearly 10% of gross new euro-denominated bond issuance by non-financial corporations, while their share of reverse Yankee issuance almost doubled between 2025 and 2026. Demand for euro area issuers’ bonds has remained strong, although investors have begun requiring higher risk premiums on hyperscaler debt as expected AI spending and issuance rise. The blog warns that projected hyperscaler capital expenditure of more than USD 1 trillion by 2028 could eventually increase market concentration, crowd out other borrowers and push up funding costs. These effects could be amplified by investors’ portfolio limits and benchmark-driven reallocations, warranting close monitoring of leverage, international spillovers and euro area market functioning.
2026-08-31European Central Bank
European Central Bank assesses rapid growth in US tech borrowing and limited euro area bond market spillovers
A European Central Bank blog finds that growing US hyperscaler issuance has broadened the euro area corporate bond market without materially crowding out other issuers so far. Hyperscalers have about EUR 40 billion outstanding and account for nearly 10% of new euro-denominated non-financial corporate bond issuance. Further growth could increase concentration and borrowing costs as investors adjust portfolios and demand higher risk premiums.