Breaking news: On Monday, Brazil’s stock market suffered a rare 19.8% crash, making it one of the most notable market events of the past 20 years. Brazil’s EWZ ETF also fell 19.8%, a move of 8.4 standard deviations. Over the past 20 years, the ETF’s average daily change was just 0.04%, with a standard deviation of 2.36%. Assuming a normal distribution, the probability of such an extreme drop is just one in 58 trillion, nearly upending the predictions of traditional statistical models.

#巴西股市 #市场暴跌 #RareEvent