Being an investor is like walking into a casino and seeing everyone crowded around a table playing the game with the worst odds of success. We seem inexplicably drawn towards activities – such as timing the short-term fluctuations of markets or taking aggressive, concentrated bets – where the chances of positive outcomes are poor, yet we carry on regardless. Why can’t we resist playing what seem like the wrong games?

– We don’t know the odds of the game: We can either be oblivious to or wilfully ignorant of the probabilities attached to the activity we are undertaking. Although this is undoubtedly common, it shouldn’t be. Understanding the base rates of success should be the first thing we do.

– We have unusual skill in the game: Assuming we are playing for more than just entertainment, the only reason to engage in a game where the odds for the average player are poor is if we are uncommonly skilful.

– We are overconfident in our own abilities: The problem with believing that we are remarkably talented is that we probably aren’t. We are far more likely to have an unjustified, inflated view of our own capabilities and erroneously believe that the odds do not apply to us.

– The game is exciting and fun to play: We play games where there is a high chance of failure if they are enjoyable, entertaining and engaging. The challenge for investors is that it is the boring stuff that works. And nobody wants to play a dull game.

– Lots of people are playing the game: If everyone else is involved in the game then we might as well join in. Not only is social proof important here (there is validation and comfort in doing the same as other people); but there becomes an expectation that we should be doing the same – we are an oddity if we don’t do it.

– We get paid to play the game: If we are paid just for playing then the odds of success matter less.

– The outcomes are asymmetric: Low probability games are attractive to play where we are able to capture a significant portion of the upside payoff, whilst other people bear the downside. (See hedge fund performance fees without clawbacks).

– There are more tables for this game: If a casino has 25 tables of low probability games that are fun to play, noisy and enticing, and a single table with a boring, quiet game with better odds of success – which one will we play? Almost certainly the former.

– We see other people winning at this game: We judge probabilities based not on the actual statistics – but what is available and salient. Huge coverage is granted to those fortunate enough to win big at low probability games and it makes us think that we can do it too. They make films and write books about the outliers and survivors in investing, not the average. 

As investors we spend far too much time focusing on how to win the game we are playing, rather than understanding the reasons we are playing at all.

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My first book has been published. The Intelligent Fund Investor explores the beliefs and behaviours that lead investors astray, and shows how we can make better decisions. You can get a copy here (UK) or here (US).