Microsoft Enters Bond Market with $25 Billion Sale to Fund AI Growth

Microsoft Corp. priced $25 billion of senior unsecured bonds on October 29, 2026, marking its first U.S. dollar bond sale since 2017 when it raised $17 billion. The transaction features 10 tranches with maturities running from two to 40 years, attracting massive investor demand with orders topping out at $115 billion, or 4.6 times the deal size. Despite holding substantial cash reserves, the company joined a broader wave of major technology firms tapping debt markets to accelerate artificial intelligence initiatives.

The offering arrived amid a wider rush of borrowing by Big Tech companies racing to fund costly data centers and infrastructure required for artificial intelligence. Major firms have collectively borrowed more than $330 billion from U.S. high-grade corporate bonds this year to support their AI operations. While companies like Oracle and Meta have also sought significant debt financing, Microsoft's pristine AAA rating positioned it to secure favorable borrowing terms from eager lenders.

Before executing the debt sale, Microsoft held $64.5 billion in cash and short-term investments against $31.1 billion in long-term debt. Chief Financial Officer Amy Hood noted during an earnings call that the corporation maintains various options to access financing markets when conditions prove attractive. Borrowing at top-tier rates allows the software giant to preserve its liquid capital for ongoing share buybacks and infrastructure development while spending outpaces incoming business revenue.

The capital expenditure required for artificial intelligence has placed heavy pressure on tech balance sheets across the industry. Microsoft reported fiscal first-quarter capital spending, including finance leases, of $45.2 billion, with cash paid for property and equipment reaching $39.4 billion. The company anticipates approximately $175 billion in capital expenditures for calendar 2026, driven largely by long-term data center rentals and advanced computing technology demands.

Investor sentiment surrounding tech sector debt remains mixed as market participants closely monitor the sustainability of the ongoing AI investment boom. Average credit spreads for high-grade technology bonds have widened compared to previous quarters, reflecting growing skepticism over how quickly artificial intelligence spending will generate returns. Nevertheless, overall borrowing costs have declined, providing a constructive backdrop for corporations seeking to lock in capital before upcoming macroeconomic shifts.

Microsoft's 40-year bonds due in 2066 ultimately priced at 1.05 percentage points over Treasuries, demonstrating robust appetite for its debt despite broader market hesitance toward high-spending tech firms. Credit markets continue to differentiate heavily among borrowers, with Microsoft's five-year credit default swaps sitting at roughly 54 basis points, compared to significantly higher risk premiums demanded for competitors like Meta Platforms and Oracle.

Market analysts will look closely at the company's upcoming fiscal second-quarter earnings report to gauge whether accelerating Azure cloud growth and strong customer demand can justify the enormous capital expenditures. Management has guided for Azure growth between 49% and 50% in constant currency, while quarterly capital spending is projected to exceed $50 billion as the artificial intelligence buildout continues.