1. Thread futures are futures with threads as the target. At present, the steel futures that can be traded on the Shanghai Futures Exchange include rebar futures and wire futures. The trading unit of the standard contract of thread futures is 10 ton/lot, and the delivery unit is 300 ton/warehouse receipt. The delivery shall be an integral multiple of each warehouse receipt. Rebar, commonly known as ribbed steel bar, belongs to small profile. It is the main component of reinforced concrete building component frame. It can also be divided into hot-rolled ribbed bars and cold-rolled ribbed bars. It is a subclass of steel products. Although China is the main producer of futures rebar, rebar can only meet domestic demand and export less because of the huge investment in domestic fixed assets. On March 27th, 2009, rebar and wire futures were listed and traded in the original exchange under the hot steel market in China. The rebar standard contract of the early futures exchange has strict regulations on its trading unit, price fluctuation range, delivery grade and deposit.
2. Line is a kind of futures. The main company refers to the main contract. In addition to the main contract, there are other positions contracts, but the main contract is the most active, and the trading volume and positions are larger than other contracts. The main line refers to the main contract price chart of rebar futures. We know that futures trading is a contract system, and the contract needs to be changed when it expires, so there will be a sense of discontinuity. For example, after the main contract of thread expires, the trend will be different if you switch to the next contract. Therefore, in order to facilitate the analysis of thread trend, there are mainly thread continuous contracts. Connect the main lines to form a main line connection, which is convenient for observing, analyzing and querying the past price trend. However, the thread main company contract cannot be traded.