"Economic moat" is a term coined by investor Warren Buffet. It means how susceptible a company is to competition by other companies. Coca-Cola and Phillip Morris (Marlboro cigarettes) are companies with wide economic moats because of the popularity and consumer loyalty of their marquee brands. Boeing has a narrow but deep economic moat because its 777 and 787 aircraft are not subject to immediate displacement, but companies like Airbus and Bombardier could play catch-up over the course of several years by developing similar models that would threaten their primacy. That would close the moat.

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