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Posted by kdadmin on February 15th, 2013.

While not directly a portfolio construction theory, the Black Swan Theory serves simply as a warning. The term “black swan” comes from a Latin expression popular in 16th century London to describe impossibility. Up to that point in time, all observed swans had been white. But on a Dutch expedition to Western Australia, explorer Willem de Vlarningh discovered black swans on the Swan River. Eventually, “Black Swan” referred to a logical fallacy, meaning, “If one doesn’t know about something, it’s therefore impossible.”


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