In their effort to capture all the profit they can, many investors focus exclusively on buying stocks. That's too bad because it means they're missing out on half the profits - literally.
I say that because the markets move in two directions - up and down - which means there's plenty of profits to be had in both directions.
George Soros, for example, made a cool $1 billion in a single trade that famously almost broke The Bank of England in 1992.
John Paulson made billions off the housing crisis when it hit by going against the grain.
Doug Kass of Seabreeze Partners is known for betting against the herd and laughing all the way to the bank.
Obviously, shorting stocks isn't for everybody - it takes a lot of guts and more than a little conviction to do it profitably. Not to mention a healthy dose of discipline.