Stock index futures can help down. Those who do futures can short, and the next issue will refer to empty orders, so that both ends will make money and retail investors will be slaughtered. The trading system is unfair. The futures index refers to T+0, and the price difference can be made back and forth every day to control the risk in time. Spot T+ 1, futures are short. Spot is inevitable and can be sold the next day. If there is a daily limit, it will be miserable.