6 AM Pacific

I am Never Wrong – Just Ahead of My Time

After last week’s post, here’s another one based upon a gem from Nassim Taleb’s Fooled by Randomness. It’s called the bias against self-contradiction and it goes like this - if you make a bet that the market will go a certain way and it doesn’t, you tend to stick with your bet and your viewpoint a good bit longer than you would have, had you been a perfectly rational person. Over time, this will likely lower your performance as an investor. According to Taleb, some investors that he has great respect for – people like George Soros – change their minds often. More »

Survivorship Bias and Godmen

I am in the middle of Fooled by Randomness by Nassim Nicholas Taleb. He talks about how we tend to draw the wrong conclusions about mutual fund performance by looking at the historical performance of today’s mutual funds. We don’t include the performance of all the funds that were closed or merged, generally on account of poor performance, because they aren’t around. This is called Survivorship Bias.

I find that Survivorship Bias is very useful in explaining the Godman phenomenon as well. More »