Finance

A Random Walk Down Wall Street is a great book and one I think every day trader should read. At the heart of it is the Efficient Market Hypothesis, which basically says that asset prices reflect all known information and thus it is impossible for a trader to beat the market over the long term (on a risk-adjusted basis).

The strongest (and most controversial) form of the hypothesis is that even professional traders cannot consistently beat the market. Even if you don't agree with that, it seems clear to me that professional traders will always be able to obtain, and analyse, new information before "hobbyist" traders, and therefore by the time a hobbyist trader gets relevant information it will already be priced in.

That book convinced me that the best way to invest is just to dump money into low-fee, highly diversified ETFs and forget about it. I'm not saying others would necessarily have the same reaction, but at the very least I think an aspiring day trader should read it and be able to justify why they don't think the points made in the book apply to them.