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

For example, if the stock index or commodity price of the futures target rises, the futures price will usually rise. In this case, if you hold a long futures position, it will inevitably lead to a floating profit of the position. According to the daily mark-to-market settlement system and T+0 trading system, you can use this floating profit to buy futures contracts and increase long positions without closing positions, instead of buying more stocks with the profits after selling stocks like domestic A-shares. Above or below the average interest rate here should mean that you use your futures position profit to increase your position without taking other measures to obtain funds at a certain cost to increase your position.