AI financing fuels record US convertible bond boom

• The market is on pace to exceed 2025's record of over $120 billion in full-year issuance, with AI-linked capex spending representing roughly 50% of 2026 convertible debt.
• High interest rates (10-year Treasury yields at 16-month highs) make convertibles attractive versus traditional debt or dilutive equity offerings, particularly for capital-intensive AI buildouts.
• Investor demand remains strong despite volatility, with hedge funds capturing implied volatility value and asset managers seeking AI sector exposure even in companies with weak credit profiles like WhiteFiber (negative P/E of 36).

Summary: AI Financing Fuels Record US Convertible Bond Boom

The US convertible bond market is experiencing unprecedented growth, driven primarily by artificial intelligence-related companies seeking flexible financing. Issuance reached approximately $34 billion in the first four months of 2026—more than double the same period in 2025—and is on track to exceed 2025's record of $120 billion.

Key Drivers:

Roughly 50% of 2026 issuance is AI-linked, funding data centers, cloud infrastructure, and power expansion. High interest rates and elevated equity valuations make convertibles attractive alternatives to traditional debt or stock offerings. Additionally, companies are refinancing pandemic-era debt issued during 2020-2021 as bonds approach five-to-six-year maturities.

Major Issuers:

• Oracle: $5 billion
• CoreWeave: $4 billion
• IREN Limited: $2.6 billion
• NextEra Energy: $2.3 billion
• Duke Energy: $1.5 billion (refinancing)
• On Semiconductor: $1.3 billion
• Microchip Technology: $900 million (refinancing)
• Tempus AI: $400 million (zero-coupon structure)

Market Dynamics:

Convertible bonds offer fixed coupons with equity conversion rights at predetermined prices, providing downside protection while capturing potential stock appreciation. This structure appeals particularly to AI companies requiring substantial upfront capital investment.

Despite market volatility and 10-year Treasury yields at 16-month highs, investor demand remains robust. Hedge funds seek relative value through embedded volatility, while long-only investors pursue AI sector exposure.

The strong appetite has enabled even riskier companies like WhiteFiber (negative forward P/E of 36) to successfully raise $230 million.

Implications:

The boom reflects confidence in AI's growth trajectory but also raises concerns about credit quality as weaker balance sheets enter the market, potentially increasing risk when equity momentum cools.