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black swanDefinition Colloquial term for any extremely rare event. The term was popularized by a book by Nassim Nicholas Taleb, entitled "The Black Swan", and was based on a previous belief (now a mis [..]
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black swanBlack swan is a term coined by Nassim Nicholas Taleb, used to describe unforeseen events in business that change previous thinking (based on the old Western belief that swans must be white before the [..]
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black swan(See RARA AVIS.)
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black swanA market event that is completely unpredictable and often without historical precedent. The sell-off on 2/27/07 would be considered a “black swan” event. By the same token the advance that followed it within three weeks pushing the market quickly back over the highs of 2/27 and much further could also be characterized this way.
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black swan
An occurrence believed impossible or not to exist, subsequently shown to exist.
An Australian swan whose feathers are black.
An occurrence believed impossible or not to exist.
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black swanlang=en
*title=, Ratiocinative and Inductive|page=379|author=|year=1843|passage=As there were black swans, though civilised people had existed for three thousand years on the earth without meeting wi [..]
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