1. The principle of corresponding buying and selling directions: that is, establishing a selling position while establishing a buying position, and cannot only establish a buying position or only a selling position. 2. The principle of equal buying and selling quantities: When establishing a certain number of buying positions, an equal number of selling positions must be established. Otherwise, the mismatch of long and short quantities will expose the position (that is, the phenomenon of net long or net short) and face the problem. Greater risk. 3. The principle of simultaneous entry and exit: Generally speaking, long and short positions must be established at the same time. Given that futures prices are volatile, trading opportunities are fleeting. If positions cannot be opened at a certain moment, the difference may become unfavorable for arbitrage, and the arbitrage opportunity will be lost. When the arbitrage position reaches the desired profit target after a period of time, hedging needs to be used to settle the profit, and the hedging operation must also be carried out at the same time. Because if the hedging is not timely, it is likely that the price difference profits obtained over a long period of time will disappear in an instant. 4. Contract correlation principle: Arbitrage is generally carried out between two contracts with strong correlation, but not all varieties (or contracts) can be arbitraged. This is because only when the correlation of the contract is strong, the price difference will return, that is, the price difference will expand (or shrink) to a certain extent and return to the original equilibrium level. Only in this way can there be a basis for arbitrage. Otherwise, arbitrage on two uncorrelated contracts is no different from one-way speculation on two different contracts.

Arbitrage is also called "interest arbitrage". There are two main forms: (1) No-cover arbitrage. That is to take advantage of the interest rate difference in the capital markets of the two countries to transfer short-term funds from the low-interest market to the high-interest market to obtain interest rate differentials. (2) Cover arbitrage. That is, arbitrageurs use forward foreign exchange transactions to avoid the risk of exchange rate changes while transferring short-term funds from place A to place B for arbitrage.