Arbitrage instruction price = A contract price -B contract price (negative when A contract price is lower than B contract price)
The "SP" used by Dashang means intertemporal arbitrage. If you order to buy "sp m1809&; M 190 1 "refers to buying" m 1809 "contract and selling" m 190 1 "contract at the same time, and the buying and selling quantities are equal; If you sell "sp m1809&; M 190 1 "refers to selling the" m 1809 "contract and buying the" m 190 1 "contract at the same time, and the buying and selling quantities are equal.
Use "SPC" to represent cross-species arbitrage. If you order to buy "SPC Y1809&; P 1809 "means to buy" y 1809 "contract and sell" p 1809 "contract at the same time, and the buying and selling quantity is equal; If "SPC y1809 & P 1809 "means to sell the" y 1809 "contract and buy the" p 1809 "contract at the same time, and the buying and selling quantity is equal.
For example, the trader's declaration instruction is "buy second-hand SP M1809&; M 190 1, and the price limit is-100 yuan ",which means that the price of the previous contract must be lower than the price of the latter contract 100 yuan before the transaction can be concluded. The following final transaction returns all meet the requirements: the previous contract bought 2 lots with a transaction price of 37 15 yuan, and the latter contract sold 2 lots with a transaction price of 38 15 yuan, with a price difference of-100 yuan.
Similarly, Zheng Shang used "SPD" to indicate intertemporal arbitrage. If he orders to buy "SPDCF 809 &；; CF90 1 "means to buy" CF809 "contract and sell" CF90 1 "contract at the same time, and the buying and selling quantity is equal; If you sell "SPDCF 809&; "CF90 1" means to sell "CF809" contract and buy "CF90 1" contract at the same time, and the buying and selling quantity is equal.
Use "IPS" to represent cross-species arbitrage. If you order to buy "IPS SF 809 &；; SM809 "refers to buying" SF809 "contract and selling" SM809 "contract at the same time, and the buying and selling quantity is equal; If you sell "IPS SF 809 &；; SM809 "refers to selling SF809 contract and buying SM809 contract at the same time, and the buying and selling quantity is equal."