This year is witnessing a landmark surge in corporate debt markets globally, with record or near-record levels of issuance on both sides of the Atlantic. The US investment-grade market has been particularly active, with issuance reaching $1.01 trillion through April 2026, marking a 28.2% year-on-year increase and putting it on track to surpass previous annual records. This robust supply has been met by solid investor demand, driven by attractive all-in yields, positive US Dollar investment-grade fund inflows, and substantial cash reserves.
Several structural forces are fueling this boom. Firstly, a significant refinancing wave is underway, with banks estimating that over $1 trillion in corporate debt, much of which was issued during the ultra-low interest rate environment of 2020–21, will need refinancing in 2026. Secondly, the artificial intelligence (AI) spending cycle is a major contributor, with Morgan Stanley analysts projecting AI-related debt issuance could hit $400 billion in 2026 as AI hyperscalers seek to fund infrastructure development. Thirdly, increased merger and acquisition (M&A) activity, with debt-funded transactions across various sectors, is adding to the issuance pipeline.
The technology and communications sectors have been significant borrowers. For instance, the technology sector issued $64 billion, and the adjacent communications sector issued $50 billion during a period mentioned by Breckinridge. Financials also saw high activity, issuing $274 billion in Q1 2026 due to redemptions, regulatory capital requirements, and balance sheet growth. Utilities have been active too, issuing $56 billion in Q1 to boost electric grid capacity for data centers. European corporate bond markets have also seen elevated activity, with US companies significantly participating in Eurobond sales, reaching a record $100 billion by September 2025 as they seek to diversify funding currencies.
