Commodity futures is the weighted average of all-day trading prices, that is, the price of each transaction multiplied by the number of lots, plus the value of the whole day. The commodity variety, trading unit, contract month, margin, quantity, quality, grade, delivery time and delivery place of futures contracts are all established and standardized, and the only variable is price. The standards of futures contracts are usually designed by futures exchanges and listed by national regulatory agencies.

Futures contracts are concluded under the organization of futures exchanges and have legal effect. Prices are generated through public bidding in the trading hall of the exchanges. Most foreign countries adopt public bidding, while our country adopts computer trading.

The development needs of the expanding information economy and the characteristics of futures itself determine that futures have huge development space. The full name of stock index futures is stock index futures, which can also be called stock index futures and futures index.

Refers to the standardized futures contract with the stock price index as the target. The two sides agreed that the target index can be bought and sold on a specific date in the future according to the size of the stock price index determined in advance. As a type of futures trading, stock index futures trading has basically the same characteristics and processes as ordinary commodity futures trading.

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