Black Swan Event

In a sentence

The sudden market shutdown was treated as a black swan event because few participants had anticipated it.

• The sudden market shutdown was treated as a black swan event because few participants had anticipated it.
• A black swan event can invalidate risk models built on ordinary market conditions.
• The fund maintained emergency liquidity in case a black swan event disrupted trading.
• After the crash, analysts debated whether it truly qualified as a black swan event.
• Diversification cannot remove every loss caused by a severe black swan event.