The black swan theory is a metaphor that describes an event that comes as a surprise, has a major effect, and is often inappropriately rationalized after the fact with the benefit of hindsight. The theory was developed by Nassim Nicholas Taleb.

What? 81 Trillion?
Citigroup mistakenly credited a customer’s account with $81 trillion last year when it meant to send just $280. The payment, which took place April 2024, […]