Lun aluminum 3 refers to the 3 behind Lun aluminum electronic disk, which represents the average price of the last three months, which can be understood as the middle month, so it has no expiration month, so its graph has been continuous. So we will only see 3 strands of aluminum, not 4, 5 and 6 strands of copper.

Lun aluminum 3 is an electronic disk in London.

Off-exchange trading (equivalent to 24-hour trading) outside the electronic disk is aluminum.

Refers to the off-site price.

Spot aluminum in London is the spot aluminum trading quotation in London.

In China, it mainly refers to Lun Aluminum Power 3.

Experts usually say, for example, Shanghai Copper 1005 is a specific copper futures of 10 in May, and the contract is due for delivery.

Shanghai Copper refers to last month's contract continuously; Lian San refers to the contract of the third month from near to far, and so does Lian Si.

Premium and discount: the difference between forward exchange rate and spot exchange rate is expressed by premium, discount and flat price. Premium means that the forward exchange rate is higher than the spot exchange rate, while the discount is the opposite. In general, the currency forward exchange rate with higher interest rate is mostly discount, and the currency forward exchange rate with lower interest rate is mostly premium. In the futures market, if the spot price is lower than the futures price, the basis is negative, and the forward futures price is higher than the recent futures price. This situation is called "futures premium", also known as "spot discount", and the part where the forward futures price exceeds the recent futures price is called "premium". When the forward futures price is lower than the recent futures price and the spot price is higher than the futures price, the basis is positive, which is called "futures discount" or "spot premium". The part where the forward futures price is lower than the recent futures price is called "futures discount rate". "Lun Wai Aluminum Official" refers to the official quotation (not only for aluminum, but also for eight metals) announced and settled after the closing of the transaction in the second quarter of the morning.

The full name of cloth oil is "Brent crude oil". Brent crude oil is a kind of light and low sulfur crude oil produced in the North Sea. It is also a benchmark quality and widely traded, which is different from the New York Mercantile Exchange light sweet crude oil futures contract.