If your investment choosing is based on you being able to predict the future, you're not going to have good results. A fifth bad way of investing is to invest in things you don't understand. You need to understand what those characteristics are because if you don't, you don't really have any business investing in it. And here's a seventh bad way of trading investing like gambling, jumping in and out of various investments on feelings, hunches, or headlines. Or looking at spurious correlations.