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Gray rhino

📈 Economics By CampusDown Wiki Editorial Team Last updated
A gray rhino is a highly probable, high-impact threat that is visible yet neglected, a concept introduced by Michele Wucker (2013 Davos; 2016 book).
Contents
  1. 1. Overview
  2. 2. Frequently asked questions
  3. 3. References

Overview

Unlike an unpredictable black swan, a gray rhino is obvious: high probability, high impact, yet ignored because of cost, denial (normalcy bias) and short-termism. Wucker’s response stages include acknowledging, defining and acting on the threat. Household debt, asset bubbles and ageing are often cited examples.

Frequently asked questions

Key difference from a black swan?
Whether the risk was widely known beforehand.

References

  1. Wucker, M. (2016). The Gray Rhino: How to Recognize and Act on the Obvious Dangers We Ignore. St. Martin’s Press.
  2. Taleb, N. N. (2007). The Black Swan. Random House.

Reports and materials that use this theory (Korean)

There are no materials dedicated to this theory yet, but you can search related reports in the CampusDown library (Korean).

Find more reports · Search '회색 코뿔소' on CampusDown →
Black swan theoryWhat a black swan event is, Nassim Taleb’s three criteria, the origin of the metaphor, commonly cited examples, the contrast with gray rhinos, and how to build resilience.📈 EconomicsNormalcy biasNormalcy bias is the tendency to underestimate a threat and delay action because things have always been fine before.🧠 PsychologyOptimism biasOptimism bias is the unrealistic belief that good events are more likely, and bad events less likely, to happen to oneself than to others.🧠 PsychologySunk Cost and the Sunk Cost FallacySunk cost explained: why unrecoverable past costs should not affect decisions, the sunk cost (Concorde) fallacy, Arkes and Blumer's experiment, escalation of commitment, and how to avoid it in investing and career choices.📈 Economics

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This article was last updated on October 24, 2026. It is based on widely recognized original works and textbooks; when citing it in a paper, please check the original sources listed in the references.