The biggest mistake an investor can make

The Motley Fool
Investing Jonathon Ross
Investing Jonathon Ross

You're probably making the worst mistake an investor can make. I know I am. And after the bull run we've been enjoying, that mistake probably got a lot worse.

The French author André Maurois once said: "Everything that is in agreement with our personal desires seems true. Everything that is not puts us into a rage."