The weight in futures is the weighted average of contracts in several specific months. Index/Weight of Futures Variety: This data is obtained by weighted average of positions of all contracts of this variety. Function: black the weighted average of multiple contracts in a specific month. Main force/main force company: continuous data of main force contracts of this variety; Continuous/recent month: continuous data of the delivery contract of this variety; The continuous data of this variety for the third and fourth consecutive months; Current month/next month/next quarter/alternate quarter: continuous data of current month's contract, next month's contract, next quarter's contract and next quarter's contract.

1. Futures trading can only trade varieties+delivery year contracts, such as Shanghai Copper 2 10 1 (referring to Shanghai Copper futures contracts delivered in 202 1 and 1), while the data displayed in the trading software, such as index, main chain and continuity of varieties, etc. Some software will automatically bring the main force, main company and index into the relevant contract, so you need to read it carefully when placing an order.

2. This paper analyzes the reasons why the index, main chain and weighted futures contracts in futures trading software cannot be traded. In the actual trading process, please choose the appropriate futures contract according to your own quantity demand, and confirm the order carefully to avoid unnecessary losses.

Development of futures:

1. The earliest futures market in history was Japan in the edo shogunate era. Because the price of rice at that time had a great influence on economic and military activities, rice merchants decided to buy and sell rice in stock according to the output of rice and the market's expectation of rice.

2. In the1970s, Chicago Mercantile Exchange and CBOT made many innovations in futures products, and vigorously developed many financial futures products, making financial futures the mainstream of the futures market. In the1980s, the Chicago Stock Exchange began to develop electronic trading platforms. At the end of 1990' s, there was a trend of mergers and acquisitions in various countries' exchanges.

3. In ancient China, there was a commodity credit and forward contract system consisting of grain depots and grain markets. During the Republic of China, there were many futures exchanges in China and Shanghai, and the market was once crazy. The puppet Manchukuo government also set up futures exchanges in Dalian, Yingkou, Fengtian and other northeast 15 cities, mainly engaged in soybean, bean cake and soybean oil futures trade. 1949 after the founding of People's Republic of China (PRC), the futures exchange disappeared in Chinese mainland for decades. By 1992, Zhengzhou had set off another wave of speculation in futures, and various provinces and cities blossomed everywhere. At most, more than 50 futures exchanges opened at the same time, exceeding the sum of futures exchanges in other countries in the world. On 1994 and 1998, China the State Council strengthened supervision twice, suspended some futures products and ordered some exchanges to stop business.