tail risk

== English == === Alternative forms === tail-risk === Etymology === From statistics, referring to the end-portion (“tail”) of distribution curves, in finance usually the left (“loss”) tail. === Noun === tail risk (countable and uncountable, plural tail risks) (chiefly finance) The probability that the value of something will fall more than three standard deviations (-3σ) below the mean; an extreme risk. Synonym: fat tail risk ==== See also ==== black swan (“a rare and hard-to-predict event with major consequences”) long tail === Further reading === tail risk on Wikipedia.Wikipedia