Word.ws English Dictionary

tail event

tail event noun: an event associated with a given infinite sequence Y=y_k|k>k_0 that is determined by any subsequence of the form Y_n=y_k|k>n,n>k_0 (a "tail" of that sequence).

tail event: an event associated with a given infinite sequence Y=y_k|k>k_0 that is determined by any...
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Noun

tail event (plural tail events)

  1. an event associated with a given infinite sequence Y=y_k|k>k_0 that is determined by any subsequence of the form Y_n=y_k|k>n,n>k_0 (a "tail" of that sequence)
  2. a low-probability event
    • Exactly two years later, it was shattered by the force of a tsunami equivalent to the impact of 250 jumbo jets flying at 1,000 kilometers an hour—the very apotheosis of a real tail event.2012, Masahiro Kawai, Eswar S. Prasad, New Paradigms for Financial Regulation: Emerging Market Perspectives, Brookings Institution Press, →ISBN, page 186
    • ... When the MS index is high ex ante, subsequent large stock market losses and crashes are no longer tail events at all—rather they are perfectly expected events.2013, Mark Spitznagel, The Dao of Capital: Austrian Investing in a Distorted World, John Wiley & Sons, →ISBN, page 243
  3. an event that initiates an activity

Forms of tail event

pluraltail events

Origin of tail event

From tail + event.

Questions about tail event

What does tail event mean?
Tail event means an event associated with a given infinite sequence Y=y_k|k>k_0 that is determined by any subsequence of the form Y_n=y_k|k>n,n>k_0 (a "tail" of that sequence).
What part of speech is tail event?
Tail event is a noun.
What is the plural of tail event?
The plural of tail event is tail events.

Words near tail event in the dictionary

  1. tail draggers
  2. tail end
  3. Tail End Charlie
  4. Tail End Charlies
  5. tail ends
  6. tail event
  7. tail events
  8. tail feather
  9. tail feathers
  10. tail fin
  11. tail fins

Source and license

Adapted from Wiktionary: tail event (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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