Legendary money manager Ken Fisher outlines the most common--and costly--mistakes investors make.

• Small cap stocks are best for all time. Bunk!
• A trade deficit is bad for markets. Bunk!
• Stocks can't rise on high unemployment. Bunk!

Many investors think they are safest following widely accepted Wall Street wisdom--but much of Wall Street wisdom isn't so wise. In fact, it can be costly bunk.

In Debunkery: Learn It, Do It, and Profit From It--Seeing Through Wall Street's Money-Killing Myths, Ken Fisher--named one of the 30 most influential individuals of the last three decades by Investment Advisor magazine--details why so many investors fail to get the long-term results they desire. The short answer is many investors fail to question if what they believe is true--and are therefore blinded by tradition, biases, ideology, or any number of cognitive errors.

Your goal as an investor shouldn't be to be error-free--that's impossible. Rather, to be more successful, you should aim to lower your error rate. Debunkery gets you started by debunking 50 common myths--but that's just the beginning. It also gives you the tools you need to continue to do your own debunkery for the rest of your investing career.