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Investment memo · 2025-11-06

Cockroaches in the Coal Mine

Oaktree Capital Management · Howard Marks

Credit risk Breach of contract Market warning Risk control

AI summary and analysis

Marks discusses risk exposure using the case of early stage problems in credit markets. His concern is whether localized defaults and stress events represent a broader credit cycle turn.

Key points

  • The "cockroaches in the coal mine" in the title corresponds to a risk judgment: if a problem is discovered, it is usually necessary to continue to find whether there are other similar problems hidden in the system.
  • He put recent credit events into the high-yield debt, private credit and leveraged financing environment, focusing on whether risks were underestimated and mispriced.
  • Marks does not advocate declaring a crisis upon seeing a few cases, but he also objects to treating each case as an isolated anomaly.
  • Most useful to investors is the process: examining underwriting standards, leverage, interest coverage, industry cycles, and capital market refinancing windows.
  • This memo can be used as a credit risk warning material, especially suitable to be read together with discussions on market spreads, default rates, and private placement credit.

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