Columbia Business School Researchers Expose $3 Trillion Private Credit Market Rating Fraud
Researchers at Columbia Business School found that the private credit market systematically underestimates actual risks. Despite ratings indicating loan safety, default rates have reached record highs.
According to Fitch, the U.S. private credit default rate reached 6.0% in April, with low-income companies at 15.8%; over 10% of loans have been written down by at least 50%. Moody’s noted that 65% of defaults in 2025 will be hidden through extensions or PIK. Life insurance companies hold $807 billion exposed to this market.
Mechanically, inflated ratings and hidden defaults drive insurance funds to continue flowing into high-risk loans. Capital circulates within a PE-insurance-private credit closed loop, benefiting private equity giants like Apollo and KKR, which charge multiple fees, while life insurance policyholders and pension systems bear the pressure.
Source: Public Information
ABAB AI Insight
Columbia Business School's research continues the trend of regulatory arbitrage in the rapid expansion of private credit since 2008. After banks were restricted, Wall Street shifted high-risk loans to shadow banking, with firms like Apollo and KKR absorbing premiums through their own insurance, such as Athene and Global Atlantic, creating a closed-loop of interests that previously masked credit risks in a low-interest environment.
In terms of capital pathways, private equity giants mobilize insurance float and leverage relationships with rating agencies to package risk assets as 'safe' allocations. This temporarily amplifies management fees and interest spread income, but as interest rates rise and the $162 billion refinancing wall approaches in 2026, hidden defaults begin to surface, threatening liquidity.
Similar to the systemic overestimation by rating agencies of MBS in 2008 that triggered a crisis, private credit is currently transitioning from shadow growth to concentrated risk exposure, reshaping market pricing through academic research and default data.
Essentially, this reflects regulatory changes and capital concentration: false ratings and hidden defaults directly challenge the shadow credit framework, accelerating the transfer of capital from high-risk closed loops to transparent assets. This forces insurance and pension funds to concentrate on more strictly regulated products, reshaping the power and risk distribution structure in the credit market.
ABAB News · Cognitive Law
The deeper the regulatory arbitrage, the more systemic the hidden risks become.
The smoother the fee cycle, the more real defaults are glossed over.
The larger the shadow market, the more concealed the entry point for the next crisis.