Anthropic Debt Now Priced at Junk After Blackstone Reverses Investment-Grade Guidance
Anthropic's junior-tranche debt is now priced at junk levels (yields above 10%) after Blackstone revised its credit rating guidance to 'high double-B' from earlier expectations of investment-grade status. This affects the $18B junior tranche of the $63B Project North Star deal, which closed on October 26. The company's debt is now ineligible for most institutional investors, limiting its buyer pool.
How this was made

The 30-second read
Why it matters
The rating downgrade reduces the pool of eligible investors, likely pressuring Anthropic's equity and increasing borrowing costs.
Market read
Credit downgrade of a high‑profile AI IPO candidate could influence investor sentiment across the AI sector and related high‑leverage financing structures.
What to watch
Potential upside if Moody's, S&P, or Fitch later assign a higher rating after the IPO, or if the senior tranche's investment‑grade backing attracts new capital.
Background
The article reports the first public disclosure of Anthropic's credit rating downgrade and the pricing of its junior debt tranche at junk levels.
Ticker impact
Anthropic's junior-tranche debt is now priced at junk after Blackstone reversed its investment‑grade guidance, revealing a BB+ rating and yields above 10%.
likely pressure as the market prices in higher credit risk and reduced investor base
The new BB+ rating and high‑yield pricing signal higher default risk, deterring large institutional buyers and potentially prompting a sell‑off.
Market effects
AI‑infrastructure financing faces tighter credit conditions, potentially affecting peers reliant on high‑leverage funding.
US tech equity markets may see modest pullback in AI‑related stocks as credit concerns rise.
Broadcom's guarantee exposure could attract attention to its own credit profile globally.
Counterpoint
If Broadcom's A‑minus guarantee remains strong, the senior tranche may offset junior‑tranche concerns, limiting equity downside.
Key entities
- companyAnthropic
AI startup planning a Nasdaq IPO, now rated BB+ by KBRA.
- companyBroadcom
Provides an A‑minus guarantee for the senior tranche of the Project North Star debt.

