In futures trading, the exchange has preferential treatment for inter-period arbitrage and locked deposits. The exchange only accepts unilateral margin, and only accepts margin for positions with large margin.

For example, while buying the contract of Kaicang 1 hand thread 1805 at the price of 3780, the contract of Kaicang 1 hand thread18/0 is sold at the price of 3565, and Kaicang18/kloc.

Unilateral margin system of four major futures exchanges

CICC: The exchange collects the trading margin of customers according to the higher one.

Shanghai Futures Exchange: Intertemporal arbitrage positions of the same variety are charged according to the larger margin of customers' unilateral trading, and intraday trading takes effect immediately.

Dashang Institute and Zhengshang Institute: Intertemporal arbitrage positions are charged according to bilateral margin for intraday trading and large unilateral margin after settlement.

Finishing: CITIC Jiantou Futures

Futures accounts have the lowest fees in domestic commodity futures and external markets.