AI debt boom strains credit markets as spreads widen

The corporate bond market is flashing caution as the largest technology companies accelerate borrowing to fund artificial intelligence infrastructure, with spreads among hyperscaler issuers widening 10 to 30 basis points in recent days and SpaceX's debut 30-year bond pushing toward a 7.5% yield — a level that suggests investors are no longer treating AI-adjacent debt as a scarce asset.

A Structural Shift in How Big Tech Funds AI

Amazon Amazon.com, Inc. ↗ 15.32%, Alphabet ↗ 6.88%, Microsoft ↗ 3.02%, Meta ↗ 3.28%, and Oracle ↗ 1.81% have collectively shifted from predominantly cash-funded operations to leverage-driven models as their AI capital expenditure budgets outstrip internal free cash flow. The five hyperscalers issued approximately $121 billion in U.S. corporate bonds in 2025, more than four times their 2020–2024 annual average. By mid-2026, hyperscaler and AI-adjacent financing had already reached roughly $165 billion — exceeding the full-year 2025 total.investing+2

Morgan Stanley ↗ 0.17% forecasts global AI-related debt issuance will more than double to nearly $570 billion in 2026, while the bank projects hyperscaler capital expenditures could exceed $1 trillion by 2027. BofA revised its 2026 hyperscaler debt estimate upward to $175 billion after Amazon's record €14.5 billion euro deal in March. U.S. investment-grade corporate bond issuance overall is on pace to surpass $2 trillion, potentially exceeding the record set during the pandemic.qz+2

The Supply Problem

Penn Mutual Asset Management's July 13 market commentary highlighted the strain. Amazon's unexpected $25 billion bond sale last week marked the seventh technology mega-deal of that size in 2026 alone — more than the total number of comparable offerings completed over the prior six years. While the broader investment-grade index widened only two basis points and remains historically tight at 76 basis points, hyperscaler-specific spreads moved materially wider.pennmutualam

Janus Henderson noted in a July 8 analysis that credit markets "remain open but cautious, demanding premiums even from highly rated technology issuers," a dynamic that could stall the broader grind tighter in credit spreads.janushenderson

SpaceX's Bond as a Bellwether

SpaceX's $25 billion debut bond offering, which priced on June 24 with tranches maturing between 2031 and 2056, has become a focal point. The longest-dated tranche has fallen steadily since issuance, pushing its yield toward 7.5% — a level comparable to junk-rated debt. As one analysis noted, "a 7.5% yield on a newly issued, high-profile security suggests the market is no longer treating every piece of AI-adjacent debt as a scarce asset".tmgm+2

The concern is not that any single issuer faces repayment risk. The hyperscalers remain highly rated with strong cash generation. The risk, rather, is that repeated waves of issuance consume dealer balance sheets and portfolio duration capacity faster than inflows can replenish them. Higher financing costs could pressure AI capex returns, compress free cash flow, and weigh on the equity multiples that underpin the broader technology rally.investing+1