Zero-coupon convertible bonds near record on AI frenzy

The artificial intelligence gold rush has reached the convertible bond market, where investors are quietly surrendering protections they have held for decades in exchange for a shot at AI-linked equity upside. Global zero-coupon convertible bond issuance hit $72 billion year-to-date as of late August, putting 2026 on track to surpass the previous full-year record of $73 billion set in 2025, according to the Financial Times.cryptobriefing

Coupons on some new deals have fallen toward zero as buyers bet that gains in issuers' shares will provide their returns instead, Bloomberg reported, noting the market is pushing toward "levels of risk-taking last seen during the pandemic".bloomberg

Aggressive Terms, Massive Deals

Zero-coupon convertibles pay no interest, forcing investors to rely entirely on the conversion option — the right to swap debt for equity at a predetermined price. Conversion premiums have climbed to levels that would have been unthinkable a few years ago. Cloudflare's ↗ 4.10% August 2026 notes carried a 60% premium, meaning the stock must rally more than 60% before conversion pays off.cryptobriefing

The roster of recent issuers illustrates where capital is flowing. Akamai Technologies ↗ 4.26% raised $3.5 billion through zero-coupon convertibles, Oracle ↘ 1.51% tapped the market for $5 billion, CoreWeave pulled in $4 billion, and Cloudflare added $2.5 billion. U.S. convertible issuance alone reached $57 billion in the first half of 2026, the highest figure ever recorded for that period.cryptobriefing

Why It Works — Until It Doesn't

AI stocks carry elevated volatility, and in convertible markets, higher volatility makes the embedded conversion option more valuable. Investors are essentially buying volatility exposure dressed up as a bond. For issuers, it amounts to borrowing at zero percent interest with dilution only if the stock climbs dramatically.cryptobriefing

But the trade-off is stark. Bloomberg reported that the shift is "weakening one of the key attractions of convertibles: the income that can cushion investors if the underlying stock falls". In a downturn, zero-coupon convertibles can perform worse than traditional bonds because the conversion option becomes worthless and there is no coupon income to break the fall.bloomberg+1

Early Signs of Pushback

Some friction has begun to appear. Recent deals have seen pushback from the buy side around dilution concerns, with investors requesting capped calls — derivative structures that raise the effective conversion price further. Roughly 30% of global convertible bonds are now tied to artificial intelligence, according to Bank of America ↗ 0.26% Global Research. The question facing the market is whether the AI trade continues to deliver the equity upside that justifies these weaker terms, or whether investors have traded away too much protection for a seat at the table.barrons+1