The limit is $0/30 per barrel/kloc, and the minimum is $40 per barrel. The direct point is that when the international oil price is higher than 130 USD, the domestic oil price may not be raised. Similarly, when the international oil price is below $40, the domestic oil price may not necessarily decrease. Under normal circumstances, when the international oil price is between 40- 130 USD, the international oil price rises, the domestic oil price is likely to adjust and rise, the international oil price falls, and the domestic oil price is likely to adjust and fall. The upper and lower limits are mainly based on the fact that China is not only a big country in oil export and consumption, but also a big country in oil production and manufacturing. Too high and too low oil prices will bring adverse harm. If it is too high, it will increase the pressure and endanger the stable operation of social economy. If it is too low, it will endanger all the normal development trends in China's oil exploitation field, weaken the ability of self-sufficiency, and further increase the dependence on opening to the outside world, which is not conducive to ensuring China's energy problems.

Brent crude oil futures contracts are settled in cash, with the market data collected by ISLOR, Argus l and Reuters on the Duganlin open bidding platform as the index. The liquidation and structure of Brent crude oil are responsible for the liquidation, which ensures the safety of funds, among which neutrality, liquidity L and market transparency have become the characteristics of NYMEX. ICE Brent crude oil futures contract is a kind of contract that can be delivered in kind, and the contract can be settled by cash transfer. The contract has the following characteristics: great flexibility: by providing futures contracts corresponding to the spot market, the oil industry can use futures cashing and basis trading to lock prices and arrange production, thus better controlling the time of buying and selling goods. Price transparency: Real-time prices can be obtained through major data providers. Therefore, all participants can know the price situation in real time when trading. Small-batch trading: Futures trading provides the possibility of small-batch trading (multiple of 65,438+0,000 barrels), while the spot market has higher quantity standards and stronger contract security: London Clearing House (LCH) is the counterparty of buyers and sellers trading on the London Stock Exchange. This ensures the financial stability of each contract (clearing member of the exchange), including delivery and settlement, and LCH has no obligation or contractual relationship to its members' customers (i.e. non-member users or non-clearing members of the exchange). Contract unit: 1 000 barrels (42,000 gallons).