Well, because if futures and stock markets can be traded 24 hours a day, retail investors will die faster. Because most retail investors are losing money, it is not good to lose money every day. Such transactions will affect their work, and many families will soon go bankrupt, causing social unrest. Haha, just kidding! However, the investment market is not so sound and should be strictly controlled, which makes sense. Guard against various risks and even lead to economic crisis.