eBay and Express Scripts Advantages Demonstrate 'Why Moats Matter' - Presented by: The Aol. On Network

Economic moats are sustainable competitive advantages which protect companies from rivals and they are also a shareholders best friend, said Heather Brilliant, author of 'Why Moats Matter' The 'moat' concept was first introduced by famed investor Warren Buffett, and now Morningstar is using it as the foundation of a stock-investing philosophy.

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