<p>David Gardner explains seven Foolish principles that investors can use to guide how they invest – and introduces a challenge for listeners.</p>

A Rule Breaker's Special Sauce

David Gardner, co-founder of The Motley Fool, is among the most respected and trusted sources on investing. As a best-selling author, hugely successful stock picker, and financial authority, David has led The Motley Fool’s growth into a worldwide investment and financial advisory services company.
Each week David shares his insights into today's most innovative and disruptive publicly traded companies -- and how to profit from them by following his signature “Rule Breaker Investing” principles.