An asteroid is definitionally a Grey Swan. Very unlikely to happen, and of great impact, but still considered possible. https://www.investopedia.com/terms/g/gr

An asteroid is definitionally a Grey Swan. Very unlikely to happen, and of great impact, but still considered possible. https://www.investopedia.com/terms/g/grey-swan.asp https://www.investopedia.com/terms/g/grey-swan.asp COVID-19s impact wasn't nearly unpredictable or unprecedented enough to be defined as a Black Swan imo. I did know many people both in real life and online who were concerned about it before the impact, considerably different from e.g. 2008 financial crisis.