The term "daily settlement system" explains that the daily mark-to-market system is closely related to the daily settlement system. The so-called daily settlement system is a system that stipulates that the margin requirements are formulated according to the principle of marking the market day by day, and all transactions and positions of all joint households on the same day are liquidated. The receipt and payment of funds and the adjustment of deposit accounts should be handled according to the reflected profits and losses, so as to ensure the exhaustion of contracts and the integrity of market finance.