With the US stock market closing up last night, and the increase is not small, investors are beginning to have high expectations for the 'Christmas market'. The so-called 'Christmas market' refers to the last five trading days of December and the first two trading days of the next year, during which the US stock market usually experiences a pump. According to historical data from 1950 to 2019, the S&P 500 index averaged a pump of 1.3% during these seven trading days of the 'Christmas market', with a high pump probability of 78%. But if Santa Claus doesn't come this time, dumping may come to Wall Street.