Zero-Coupon Convertible Bond Issuance Hits Record High as AI Companies Lead the Financing Wave
Nashnova编辑部
Global zero-coupon convertible issuance has reached $72 billion this year, closing in on last year's full-year record; AI companies are leveraging extreme stock volatility to slash coupon costs, while elevated interest rates push more issuers toward the structure.
What does $72 billion tell us?
Dealogic data show zero-coupon convertible issuance has hit $72 billion year-to-date, just shy of the $73 billion full-year record set in 2025 — with months still to go.
This means → breaking the prior record is all but certain; zero-coupon convertibles are shifting from a niche instrument to a mainstream funding tool.
The broader convertible market is surging too: Barclays data put total U.S. convertible issuance above $113 billion this year, with zero-coupon deals accounting for roughly 41%.
Why can AI companies push the coupon to zero?
A convertible bond — a bond that can be exchanged for stock at a preset price — embeds a call option. The higher the stock's volatility, the more that option is worth.
AI companies carry extreme volatility → the embedded option is highly valuable → investors accept lower, even zero, coupons in exchange.
In plain terms = the better the "lottery ticket" you're selling, the less interest the buyer demands. Nicolas Crémieux, head of convertibles at Mirabaud Asset Management, put it directly: "The companies coming to this market now have far higher volatility than the ones they are replacing. If you're selling something more valuable, you can give away less."
How are high interest rates adding fuel?
The U.S. 10-year Treasury yield has climbed from 4.15% to 4.66% this year, sharply raising the cost of conventional bond financing.
Dorian Carrell, co-manager of convertibles at Schroders, noted that many companies now realize rates are staying elevated far longer than 2020–2021 expectations → they are turning to zero-coupon convertibles to cut funding costs.
This means → zero-coupon convertibles are not just an AI preference — they are a rational choice for any issuer in a high-rate environment, trading equity optionality for interest savings.
Which deals stand out this year?
ON Semiconductor issued $1.3 billion in zero-coupon notes in May.
Ciena Corp — an optical-networking and software company — issued nearly $2.9 billion in zero-coupon convertibles in June.
Cloudflare issued $2.5 billion in zero-coupon convertibles in August, setting the conversion premium — the extra investors pay above the stock price to convert — at 60% of the prior close, with a capped call (a hedge that limits maximum conversion upside) struck at 175% of the issue price.
Is "zero coupon" really zero cost?
The coupon is zero, but the issuer's real cost has not vanished. As bond yields rise, investors demand richer terms → issuers are forced to lower the conversion premium.
To protect existing shareholders from dilution, issuers typically buy capped calls from banks, funded out of the bond proceeds — raising upfront costs.
Carrell noted: "Without these structures, the coupon would rise to around 2%." In plain terms = zero-coupon convertibles move the interest bill elsewhere — they don't eliminate the cost, they restructure how it's paid.
Can the boom last?
Venu Krishna, head of U.S. equity strategy at Barclays, said American convertibles are on a record issuance pace, with zero-coupon deals especially prominent.
The core driver is the ongoing AI capex cycle — as long as AI companies need massive capital for infrastructure, the combination of high volatility + high rates will keep pushing zero-coupon issuance.
This reflects a deeper signal: when a financing instrument's boom rests on a single sector's extreme volatility, a cooling of the AI narrative could cause this structure's appeal to contract quickly.
市场有风险，内容仅供研究参考，不构成投资建议。