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Inflated ‘Private’ Ratings Are Masking Credit Risk, Columbia Study Says

Bloomberg Markets · Jun 8, 2026, 7:52 PM · Also reported by 3 other sources

Ratings that underpin a growing slice of the $1.8 trillion private-credit market, the hottest corner of Wall Street in recent years, are systematically understating investment risk, according to a new study by Columbia Business School researchers.

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Inflated ‘Private’ Ratings Are Masking Credit Risk, Columbia Study Says

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