结论是没有关系，或者是负相关

Mark Hulbert, a Market Watch analyst, performed a study in 2008 and looked at a 114-year sample on stock market performance following Thanksgiving and throughout the rest of the calendar year. He concluded that there was no correlation between a Black Friday bump and Q4 performance.  In fact, in recent years the market had performed exactly the opposite of the Friday/Monday reading. When stocks were up on those days, they were typically down till the end of the year and vice versa.

https://blogs.kent.ac.uk/antonis/2016/11/26/how-is-the-stock-market-affected-by-black-friday/