I just came across a pretty interesting concept called the "Black Swan." The name might sound a bit unfamiliar, but it’s very important for understanding unpredictable events in the real world.

What does the concept of a black swan mean? It refers to extremely rare, unexpected, and unpredictable events. Nassim Nicholas Taleb, the author of the famous book of the same name, coined this term to describe phenomena that traditional statistical models cannot capture.

Why is it called a black swan? The story is quite meaningful. Europeans long believed that all swans were white, so they thought black swans did not exist. But when black swans were discovered in Australia, it completely overturned existing expectations and theories at the time. That’s why Taleb chose this name — it has a powerful visual image that easily evokes the idea of surprising and unpredictable events.

The beauty of the black swan concept is that it reminds us that past experience does not guarantee the future will be the same. Taleb emphasizes in his book that when faced with uncertainty, we often build assumptions to convince ourselves that we can control the situation. But in reality, most changes in the world do not happen in a linear and smooth manner.

Traditional risk models based on past data cannot predict black swan events because these events have never happened before. This explains why black swans are so significant in risk management and investing — they remind us to always prepare for surprises that we cannot foresee.