The so-called lock position generally refers to an operation method in which spot asphalt investors and traders open positions in the same amount but in opposite directions, so that no matter where the oil price changes (or rises or falls), the profit and loss of positions will not increase or decrease.

Asphalt locking includes profit locking and loss locking.

Profit lock-in refers to a certain amount of book profit generated by holding futures contracts for a period of time and opening new positions in the same contract and in the same amount without opening positions.

Loss locking refers to a certain amount of book losses after holding futures contract positions for a period of time. Because you don't want to turn the book loss into an actual loss, you open a new position in the same contract in the opposite direction without opening your position, in an attempt to lock in the number of losses.