An unprecedented number of US companies are turning to Europe's bond markets, drawn by liquidity and attractive terms as their home market strains under a deluge of AI-related debt. Amazon.com Inc. is looking to sell its first sterling bond on Wednesday, while Uber Technologies Inc is making its euro market debut. They were joined by four others.

It's the first time Europe has seen such a large number of US issuers in a single day, according to data compiled by Bloomberg.