Because the futures market is a T+0 transaction, you can close the position immediately when you open the position (by the way, the impression of Dalian Stock Exchange is that all positions are copies within 3 seconds, and the handling fee is favorable), which leads to the existence of a large number of investment funds. The most exaggerated person I have ever met, who made more than 300 round trips a day and traded 20,000 lots (rubber), and his own turnover was less than 65,438+. Having said so much nonsense, intraday price fluctuation is mainly caused by the trading operation of main funds and psychological factors or technical analysis of retail investors under T+0 trading rules, which in turn causes price fluctuation. The exchange has taken many measures to prevent the price from fluctuating violently due to the influence of funds and psychology, such as the price limit system, the daily settlement system with the weighted average price as the settlement price and so on.