Competitive advantage: Often overlooked, frequently misunderstood, and generally underappreciated, it may be the most important factor investors should consider before taking a long-term stake in a company. In this video, Motley Fool Co-Founder and Chief Rule Breaker David Gardner presents three critical aspects of competitive advantage -- brand, distribution, and vision -- and looks at companies that possess them in spades
Back in the late 1990s, many people underestimated Amazon
Watch the video below.
For more video analysis, go to FoolTV.com. And to follow our Foolish coverage on any of these stocks, add them to My Watchlist.