The Chart of the week
Debt issuance to finance the AI Capex boom reshapes the US credit market
Corporate credit spread evolution and differential – US Investment Grade market & US IG Tech sector

Source: Banque Syz, Factset
AI is no longer just an equity market story; it is becoming a defining force for credit markets. The evolution of the sector’s credit spreads captures the shift: technology-sector spreads, once firmly tighter than average due to a combination of low leverage and high cash flow generation, have progressively converged toward the broader IG market.
Since the beginning of the year, the US IG Tech Sector even exhibits wider average spreads than the US IG Broad Market, and the gap has widened further in July. US IG Tech spreads are close to their peaks reached in March this year or April 2025 (post Liberation Day). In the meantime, the average spread of the US IG markets remains close to an all-time low level.
Unprecedented issuance is currently testing investors’ absorption capacity. Hyperscalers alone have issued $194bn year-to-date in 2026, and total AI-related debt issuance approaches $500bn this year already. The constraint is not balance-sheet capacity: highly rated technology companies can continue to add substantial leverage while remaining comfortably investment grade.
The pressure is instead on pricing, concentration and duration. With AI borrowers accounting for 18% of total US IG issuance and around 40% of long-dated supply, investors are becoming more selective, particularly at the long end, as the US tech sector is on its way to become the second largest sector of the market after Financials.


