magfrump comments on Fundamentally Flawed, or Fast and Frugal? - Less Wrong

41 Post author: Kaj_Sotala 20 December 2009 03:10PM

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Comment author: Bo102010 20 December 2009 10:00:24PM 2 points [-]

Note also that "tend to do better than" does not mean "tend to outperform the market as a whole," an important point.

Comment author: magfrump 21 December 2009 02:00:22AM 2 points [-]

for any well-defined sense of "tend to do better than" it has to, otherwise it isn't tending to do better.

(since any stock someone has heard of is "tending to do better than" the set of stocks people haven't heard of)

Unless the statement was intended to be "stocks of companies people have heard of tend to do better than stocks of SIMILAR COMPANIES people haven't heard of."