Therefore, shorting stock index futures has become a hedge for long stocks. This is from the perspective of hedging.
From the perspective of unilateral speculation, large funds can hold short positions in stock index futures in advance, and then sell the profit-making discs of previous heavyweights to suppress the index, thus making profits in stock index futures and stocks. Of course, it has to be a lot of money.
On the contrary, there is only so much you can do.
I think this is related to the fact that the China stock market can only do more unilaterally, and there is no way to improve the mechanism