Tonight, there may be an opportunity for the US stock market to pick you up. One night every month, Wall Street is helping you create low-priced chips. Tonight is it. Because tonight is the settlement day for VIX options. VIX is the Volatility Index, and the more people panic, the higher it becomes. Market makers sell VIX options to make money, but if they do, they have to buy S&P futures to hedge. In recent days, S&P has risen for nine out of ten consecutive days, and they have bought more futures. The option expires tonight, and the mission of this' hedge position 'is over. It needs to be liquidated. It's not because the institutions are bearish, it's mainly due to expiration and having to sell. A group of institutions doing the same necessary thing at the same time. So every VIX settlement day in history, You will all see the same picture, The index suddenly fell from its intraday high, 0.8%~1.2%， Then the market continues to rise. If it falls, buy some.