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UBS chair warns of 'systemic risk' from private credit ratings. Apollo CEO fires back: 'He's just wrong.'

Reported by Businessinsider
Nov 4, 2025· 3 min read
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Key Takeaways
  • • UBS Chairman Colm Kelleher warns that unregulated proliferation of small rating agencies in the insurance sector is creating a "looming systemic risk" comparable to pre-2008 subprime rating arbitrage, driven by insurers' migration into private credit assets.
  • • Apollo CEO Marc Rowan directly contested Kelleher's assessment, stating "Colm is just wrong," and countered that 70% of Athene's (Apollo's insurance platform) assets carry dual ratings from tier-one agencies—S&P, Moody's, and Fitch.
  • • The private credit market has expanded to approximately $1.7 trillion in assets, with insurers becoming major institutional investors seeking steady, investment-grade returns through private financing vehicles, including captive insurance lenders and direct partnerships.
  • • Rating agency arbitrage is the core dispute: Kelleher flagged the risk of small agencies providing favorable ratings for compliance purposes, while Rowan defended smaller firms like Kroll and DBRS as possessing superior expertise in structured products.
  • • The conflict underscores regulatory gaps and divergent views on financial stability within the surging private credit sector, with major private capital firms (Apollo, Ares) defending the sector's stability while traditional banking leadership raises systemic concerns.
Summary
UBS Chairman Colm Kelleher escalated concerns about private credit market stability on Tuesday, warning that inadequate regulation and a proliferation of small rating agencies in the U.S. insurance industry are creating a "looming systemic risk" to global finance. Speaking at a conference hosted by the Hong Kong Monetary Authority, Kelleher highlighted the dangers of rating agency arbitrage, drawing explicit parallels to the 2007 subprime crisis. He noted a "massive growth in small rating agencies ticking the box for compliance," a dynamic he characterized as fundamentally similar to the pre-2008 environment where ratings inflation preceded systemic failure.

Kelleher's warning targets a structural shift in institutional capital allocation. Insurers—traditionally conservative investors favoring investment-grade debt—have increasingly deployed capital into private credit assets, which now represent approximately $1.7 trillion in market size. Private equity firms have accelerated this trend by establishing or acquiring captive insurance platforms, such as Apollo's Athene subsidiary, or by forging direct partnerships with established insurers to manage and deploy capital into private financing vehicles.

Apollo CEO Marc Rowan countered Kelleher's thesis directly, stating during the company's fourth-quarter earnings call: "Colm is just wrong." Using Athene as a case study, Rowan argued that risk controls within institutional insurance platforms are robust. He emphasized that 70% of Athene's assets carry dual ratings from the three largest, most established rating houses—S&P, Moody's, and Fitch—demonstrating reliance on tier-one agencies. Rowan further defended the use of smaller agencies like Kroll and DBRS, asserting that these firms "have most of the expertise right now in structured products," thereby reframing small agency involvement not as a compliance shortcut but as a rational choice for specialized expertise. Ares CEO Michael Arougheti echoed Rowan's sentiment, agreeing that larger private capital firms operate with stronger risk management than smaller players.

The dispute reflects a fundamental disagreement about systemic risk within rapidly evolving private credit markets. Kelleher's perspective emphasizes regulatory arbitrage and the potential for synchronized rating downgrades if market conditions deteriorate, while Rowan's position prioritizes the financial stability benefits of professional institutional capital management and the role of multiple rating agencies—both large and specialized—in accurate risk assessment. The tension highlights unresolved questions about oversight frameworks for private credit, particularly as insurance assets continue migrating into this asset class.

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Sources

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Businessinsider UBS chair warns of 'systemic risk' from private credit ratings. Apollo CEO fires back: 'He's just wrong.'