Generally speaking, the "black swan" event refers to an event that meets the following three characteristics:
1, which is unexpected;
2, has a significant impact;
Although it is unexpected, human nature urges us to fabricate reasons for it afterwards, which is more or less explainable and predictable.
Extended data
Stock market influence
1, Ping An's "financing gate" and the melamine incident made the wealth of "Black Swan" suffer the most serious damage in 2008. After a relatively calm year in 2009, the blood loss torn by the "black swan" increased year by year. The public pays more and more attention to product safety, and public opinion is playing an increasingly important role. ?
2. More than 2% listed companies in the main board, small and medium-sized board and growth enterprise market have "black swan" incidents, and the ratio of the three is 44: 15: 8. The "black swan" of GEM is concentrated in 20 12. Food and beverage, medicine and biology, and non-ferrous metal industries are places where "black swans" occur frequently. ?
3. Two-thirds of the "black swan" incidents are caused by listed companies themselves, and improper governance is the main inducement, and the number is expanding every year. Product safety, financial fraud, false approval, poor performance and pollution accidents are the most typical.
The environmental pollution accident has come to the moment that we must face it squarely. Although the reaction of listed companies' share prices to environmental accidents is obviously lagging behind, and the negative impact can be eliminated in about 10 days. But this kind of injury is actually more hidden, and the subsequent "injury" should not be underestimated. ?
With the bursting of the bubble, investors' caution has been enhanced. In 20 12, the number of "black swans" caused by "sudden change of investors' expectations" dropped sharply to 1. But the "black swan" gambling game is far from over. The damage caused by the bursting of the over-hyped bubble is also devastating and worthy of vigilance.
Baidu Encyclopedia-Black Swan Event