Phrase guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
The probability that the value of something will fall more than three standard deviations (-3σ) below the mean; an extreme risk.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: business, finance
No example sentence was provided for this meaning.
Synonyms: fat tail risk
Antonyms: none provided
History
From statistics, referring to the end-portion (“tail”) of distribution curves, in finance usually the left (“loss”) tail.
