Reflections on the Ten Attributes of Great Investors [notes]

Yesterday I read the report published by Michael Mauboussin called as this post title. Michael is Head of Global Strategy at Credit Suisse. I am fascinated with this report, all the common sense Michael share in it. Also, I would like to recommend the Alphaville podcast with the author.

About teaching:

Teaching imposes a discipline of understanding and communication that few other activities can—save perhaps writing. Inspirational teachers are also diligent students. So a commitment to teaching at a high level demands constant learning and consolidation of knowledge. There is the additional benefit of being around young people who are bright and challenging.

Actual time to be an investor:

As I like to tell my students, this is an exciting time to be an investor because much of what we teach in business schools is a work-in-progress.


I believe in economic value, the importance of constant learning and teaching, and that diverse input combined with rigor can lead to insight. This is all very consistent with what Charlie Munger, the vice chairman of Berkshire Hathaway, calls the “mental models” approach.

Michael divided his work into 10 attributes that great investors have.

  1. Be numerate (and understand accounting), Michael comments his favourites books:

    Financial Shenanigans: How to Detect Accounting Gimmicks & Fraud in Financial ReportsCreative Cash Flow Reporting: Uncovering Sustainable Financial Performance, The Financial Numbers Game: Detecting Creative Accounting Practices, The Art of Short Selling. Financial statements have two goals: 1) translate financial statements into free cash flow and 2) find the link between company’s strategy and how it creates value.

  2. Understand value (the present value of free cash flow). Try to understand the magnitude and sustainability of free cash flow.
  3. Properly assess strategy (or how a business makes money). Two dimensions:
    1. How the company makes money.
    2. The competitive advantage when it earns a return on investment above the opportunity cost of capital and earns a higher return than its competitors.
  4. Compare effectively (expectations versus fundamentals). Human are quick to compare but not very good at it. Here Michael explains the “variant perception” concept, I first here about this concept in a well-know twitter account called @PlanMaestro. Variant perception definition: “He develops perceptions (intellectually sound investment thesis) which are at variance with the general market view. In other words, a view that is at odds with the prevailing Wall Street view. He will play those variant perceptions until he feels they are no longer so.”. Fundamentals are how fast the horse will run, and expectations are the odds.
  5. Think probabilistically (there are few sure things). Here the point is that you need to earn more when you are right versus when you are wrong, even if you are wrong more times than right.
  6. Update your views effectively (beliefs are hypotheses to be tested, not treasures to be protected). Open-minded, period.
  7. Beware of behavioural biases (minimizing constraints to good thinking). Here, Michael, presents Keith Stanovich’s idea between IQ (intelligence quotient) and RQ (rationality quotient). I save the name of the last book called The Rationality Quotient. IQ = “mental skills that are real and helpful in cognitive tasks” and RQ = “the ability to make good decisions”.

  8. Know the difference between information and influence.
  9. Position sizing (maximizing the payoff from edge).
  10. Read (and keep and open mind). Albert Einstein’s quote:”success comes from curiosity, concentration, perseverance and self-criticism”.

Multiples are not valuation but a shorthand for the valuation process. No thoughtful investor ever forgets that. Shorthands are useful because they save you time.

What I found more useful in this report is the following part. To peak performance as an investor, you need some factors. From left to right you can find it.

Captura de pantalla 2017-02-19 a las 21.41.35.png


Both Keith Stanovich’s work on IQ and RQ and Phil Tetlock’s work on superforecasting strongly suggest that there’s more to good decision making than traditional smarts measured through IQ. Qualities such as active-open mindedness, thinking probabilistically, an ability to update views frequently and accurately, and persistence are not well captured in tests. Even proxies for intelligence, such as graduating from an elite university, do not do the job.

Deliberate practice.

Done properly, deliberate practice is designed with a specific objective, requires timely and accurate feedback from a coach or teacher, entails substantial repetition, and is only viable for students who are motivated. Deliberate practice is not fun, but it is gratifying because the performance improvements are tangible.

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