black swan

• Непредсказуемое событие или явление, оказывающее значительное влияние, часто используемое в финансах и анализе рисков для описания редких и непредвиденных феноменов, которые задним числом рационализируются.

An unpredictable event or occurrence that has a major impact, often used in finance and risk analysis to describe rare and unforeseen phenomena that are rationalized in hindsight.

1. Unexpected eventC1formal

   An unpredictable event that has severe consequences and is often inappropriately rationalized after the fact.

   Чёрный лебедь

   • The 2008 financial crisis was a black swan event.
   • Many experts failed to predict the black swan of the pandemic.
   • The company's collapse was a black swan that no one saw coming.

2. Rare occurrenceB2informal

   Something extremely rare or unlikely to happen.

   Редкое событие

   • Finding a four-leaf clover is like a black swan.
   • A total solar eclipse is a black swan in some regions.
   • Winning the lottery twice is a true black swan.