Multi-exchange: that is, long A sells the contract and closes the position, and long B buys a long contract and continues to do more, that is, a long contract is transferred from A to B, so it becomes multi-exchange. Empty flat: empty warehouse.
Double flat: that is, long positions sell contracts and short positions buy contracts. Both sides are closing positions, so it is called "double flat" to open more positions.
Extended data:
Trading time of stock index futures: early 15 minutes, late 15 minutes.
According to the stipulations in the Shanghai and Shenzhen 300 stock index futures contract (draft for comment), the trading time is "9:15-1:30, 13: 00- 15", and the last trading day is ".
In other words, except for the last trading day, the Shanghai and Shenzhen 300 stock index futures opened 15 minutes earlier than the stock market and closed 15 minutes later than the stock market. This design is more conducive to the futures market to reflect the stock market information, and it is convenient for investors to use stock index futures to manage risks.
Fang Futures Senior Consultant said that the futures market in the United States is trading for 24 hours, while in Taiwan Province, China, it is increased by 15 minutes in the morning and evening, just like the Shanghai and Shenzhen 300 index futures.
As a tool for price discovery, futures open 15 minutes earlier than the stock market, which is beneficial to price discovery of all parties in the market. And the closing time is 15 minutes later than the stock market, because it will take some time to digest the liquidity and let the market make an estimate of the next day's price, so as to better play the price discovery function. ?
Baidu encyclopedia-stock index futures