"Quadruple Witching" refers to the simultaneous expiration of stock index futures, stock index options, stock options, and single stock futures all at the same time. The simultaneous expiration of these four asset classes can lead to significant market volatility and a tug-of-war between bulls and bears.

A classmate reminded me that today is Quadruple Witching Day, and it is also a turning point, which is related to the weekly closing level linked to the U.S. stock market! $BTC