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A black swan (Cygnus atratus) in Australia. The black swan theory or theory of black swan events is a metaphor that describes an event that comes as a surprise, has a major effect, and is often inappropriately rationalized after the fact with the benefit of hindsight. The term is based on a Latin expression which presumed that black swans did ...
Black Swan was presented in a sneak screening at the Telluride Film Festival on September 5, 2010. [40] It also had a Gala screening at the 35th Toronto International Film Festival later in the month. [41] [42] In October 2010, Black Swan was screened at the New Orleans Film Festival, [43] the Austin Film Festival, [44] and the BFI London Film ...
The Black Swan: The Impact of the Highly Improbable is a 2007 book by Nassim Nicholas Taleb, who is a former options trader.The book focuses on the extreme impact of rare and unpredictable outlier events—and the human tendency to find simplistic explanations for these events, retrospectively.
A grey swan is an event that is known and possible to happen, but which is assumed to be unlikely to occur. [1] The term derives from black swan theory, which describes an event which is unlikely but unknown. [1] In electrical engineering, gray swan refers to the kind of events that rarely happens but have great impact on power systems. [2]
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The Australian black swan (Cygnus atratus) is completely black except for the white flight feathers on its wings; the chicks of black swans are light grey. The South American black-necked swan has a white body with a black neck. [18]
The Roman satirist Juvenal wrote in AD 82 of rara avis in terris nigroque simillima cygno ("a rare bird in the lands, and very like a black swan"). [6] He meant something whose rarity would compare with that of a black swan, or in other words, as a black swan was not thought to exist, neither did the supposed characteristics of the "rare bird" with which it was being compared.