Tail risk is a technical measure ofportfolio risk that arises when there is an increased probability that an investment will experience a price swing much larger than it would be expected to under normal conditions.
By concentrating on the largest, most liquid segment of the universe, the portfolio has an inherent bias towards holding those coins the market believes have the highest probabilityof success.
Because of the devastation a large loss inflicts on a portfolio, the analysis of the probabilityoflarge negative returns is critical to long term investment planning.