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Investment memo · 2003-07-01

The Most Important Thing

Oaktree Capital Management · Howard Marks

Second-order thinking Risk control Price discipline Classic

AI summary and analysis

This memo was one of the sources of thoughts for Marks' later book of the same name. The core is that there is no single most important thing, and good investment requires multiple principles to be established at the same time.

Key points

  • Marks used the expression "the most important thing" to repeatedly illustrate that investment success is not a formula, but a set of mutually restrictive principles.
  • Key principles include second-order thinking, price discipline, risk control, cycle awareness, contrarian behavior, and patience.
  • This material emphasizes that good investors should see risks or opportunities where others ignore them, rather than just obtaining the same information.
  • It also explains why Oaktree places a premium on avoiding big mistakes: Compounding interest first requires staying in the game for the long term.
  • The core is that this is the most suitable classic for getting started with Howard Marks' public ideology.

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