Black Swan

Black Swan – the black swan is a term or phrase used to describe a rare event or something beyond the realm of normal expectations or reality.  The black swan phrase only applies to very large incidents or magnitude.  The term began back in 17 century Europe where it was assumed that all swans were white, so the black swan was a symbol of the impossible... The term “Black Swan” was made popular by Nassim Nicholas Taleb, a Wall Street trader and former professor... In the financial world a Black Swan is a usually random and UN expected event.