Stock markets have a very interesting and very important peculiarity. I’m talking about self-fulfilling expectations, that is the fact that if people expect something to happen, it happens for the simple fact that it was expected.
It’s very simple how this works: imagine, for example, that enough stock-owners expect stock prices to fall. In this case, they will try to sell their shares before prices fall too-much. But their selling, because of the basic law of supply and demand law”, will affect stock prices, lowering them. So you can see that just because people expected prices to fall, prices fall.
Clearly, the final effect will depend from how many people expected the price fall to happen: roughly, prices will diminish proportionally to how many people believed they would fall (I gave an example with price fall, but also for price rise it would work just the same way).
In fact, to successfully invest in the stock market is not enough to choose the analysis technique you like best and study in-depth just that. You need to know every technique (or at least, the most used), people use, since you may get some hint on some emerging expectation that (if enough people is involved) may self-fulfill itself.
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