Big Tech Is Borrowing Trillions to Build AI. The Bond Market Has Never Seen Anything Like It.
Something structural is happening inside the corporate bond market, and it is moving faster than most investors expected. The five major hyperscalers, Amazon, Alphabet, Meta, Microsoft, and Oracle, issued approximately $121 billion in US corporate bonds in 2025 alone. That was more than four times their annual average between 2020 and 2024. In 2026, projections place that figure between $130 billion and $150 billion from these companies alone, with total US investment grade gross issuance forecast to hit a record between $1.8 trillion and $2.25 trillion for the year.
The reason is straightforward. Tech giants Google, Amazon, Microsoft, and Meta are expected to spend more than $400 billion on data centres in 2026, on top of over $350 billion in 2025. Despite holding around $350 billion in liquid assets and producing strong operating cash flows, these companies are turning to debt markets to keep pace with the AI infrastructure buildout. The scale of the ambition simply exceeds what internal cash generation can fund in real time.
The issuance is not staying within US borders. Alphabet and Amazon have led a surge in multi-currency debt across Europe, Japan, Switzerland, Canada, and the UK. Amazon's €14.5 billion euro deal set a record as the AI borrowing wave expanded beyond dollar markets. Bankers say non-dollar markets now offer enough capacity for mega-cap issuers to raise large amounts without relying solely on US investors.
For ordinary investors, the consequences are meaningful. Bond portfolios that historically tracked interest rates and bank performance are now increasingly correlated with technology companies. Portfolio managers are having to decide how much AI exposure they are comfortable holding across both their equity and fixed income allocations simultaneously.
Moody's has flagged that capital spending on computing power is currently outpacing actual revenue growth from AI applications. BlackRock noted the issuance wave bridges the gap between current investment and future revenues, while warning that rising corporate borrowing adds supply to bond markets already struggling to absorb large public deficits. Some analysts have raised the possibility of an AI debt bubble if returns on this infrastructure do not materialize at the projected scale.
The debt is manageable today. But the gap between what is being borrowed and what AI is currently generating in revenue is a risk that fixed income markets are only beginning to price properly.
