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How to collect the lock fees of the three major futures exchanges?
1. The warehousing fees of the three major futures exchanges are normal contract fees. The charges for various varieties are now unilateral charges, but they are all free.

2, the so-called lock position, generally refers to the futures traders do the same amount but in the opposite direction, so that no matter where the futures price changes (or rises or falls), it will not increase or decrease the position profit and loss.