Stock index futures are not good news, they are just good news for certain stocks. In a sense, this is a disadvantage. Through the launch of stock index futures, the state indirectly promoted the short-selling mechanism and paved the way for subsequent securities lending. If you want to promote it, it is undoubtedly the most effective way to let everyone make money. As for the short-selling mechanism, you will only make money if it falls, so considering this aspect, it is actually negative.