This mainly refers to the use of the daily mark-to-market settlement system and T+0 system of futures trading to increase positions and obtain additional profits.

For example, if the price of a futures underlying stock index or a certain commodity rises, usually the futures price will also rise. In this case, if you hold a long position in futures, it will inevitably generate floating profits for the position. According to With the daily mark-to-market settlement system and T+0 trading system, you can use this part of the floating profit to buy futures contracts and increase long positions without closing the position, instead of like domestic A-shares, if the stock rises You need to sell the stock at a profit and then use the profit to buy more stocks. What refers to above or below the average interest rate here should mean that you use the profits from your futures positions to increase your position, and do not need to use other means of obtaining funds to increase your position at a certain cost.