US tech giants issue bonds for AI investments, raising investor concerns

US tech giants are increasingly issuing bonds to fund massive AI investments, raising investor concerns about market strain. This surge in debt issuance, totaling nearly $90 billion from four major companies since September, aims to finance AI-ready data centers, a shift from their usual cash-funded approach. While current leverage remains low, the growing debt supply is fueling worries about the bond market's capacity and the sustainability of AI spending.