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- 14 February 2005
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+1We do not need to fully understand something to use it. But if our understanding is insufficient, more bad stuff tends to happen than would otherwise be the case.
A key difference with investing is the presumption of DIY when it comes to the stock market. If you are buying shares directly, or are investing in an "all stocks" managed fund, then you have basically chosen to totally (direct) or partly (managed fund) DIY the decision making process as to what to invest in. And if things go wrong, well then you're on your own to deal with it.
If the computer, car or electricity stops working then most people will call a professional, or at least a friend, to assist if they can't spot the problem themselves. But if your self selected share portfolio drops 20% next week, well then what do you do? Most wouldn't even think of paying someone for advice in that situation. Then emotion combined with lack of knowledge takes over.....
We'd have a lot more people electrocuted if they took the same approach to electricity as is taken with investing. Nobody in their right mind just pokes random wires into random terminals, does the screws up then turns the power on hoping for the best. But that's pretty much what many do when it comes to investing and that leads to fear amongst those who don't understand anything about it. They'd be terrified of electricity too if we took the same approach and every second house burnt down.