Posted on January 19, 2009 - by Jay

Random Thoughts on Various Investment Topics

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In this post I would like to share my thoughts on my stance on various matters in investing like whether EMH works or not, TA is bullshit or not etc. So let’s start!

Value concepts: I subscribe to most value investing concepts like margin of safety, circle of competence, buy things on sale, value-for-money etc. Most of these are very common-sensical and I don’t think there is a need to argue with that. If you have no idea what are these, start reading this blog from the first post back in early 2006.

EMH is bullshit: One thing that I do not agree with other value investors would perhaps be the lack of respect for efficient markets. I think that markets are efficient and it’s not easy to beat them. The market is the confluence of everybody’s viewpoints and this collective wisdom is actually, usually right, at that point in time. However the market also has an investment horizon that is the average of its participants’ horizon, which is usually not very long, abt 1 yr I think. This is probably the only reason why value investors get to have an edge, bcos we look at co.s with solid fundamentals that should outlast market’s short-termism over time. Still, I don’t think it’s easy to get much higher than average return of 8%pa.

Chart reading: I used to think that chart reading is pretty much bullshit bcos if you look at past tosses of coins, can you use that to predict the outcome of your next toss? No. But that is what TA is trying to do. However, prices are not like coins and do have some memory so it might predict future prices. But my guess is its predictive power is probably 2-3 days. So, not that useful. The reason why TA can still work is probably self-fulfilling prophecy at work. Lots of participants playing the game with TA and hence prices do bounce off support levels. I did a simple simulation on the comment section of the last post. Basically, it’s possible to make positive return using TA but again, you may not beat market returns. Nonetheless, there are pple who can beat the market using TA and I salute them. Read more…

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