The full name of stock index futures (SPIF) is stock index futures, which can also be called stock index futures and futures index. It refers to the standardized futures contract with the stock price index as the subject matter. The two parties agree to buy and sell the underlying index according to the size of the stock price index determined in advance at a future date, and settle the difference in cash after the expiration. As a type of futures trading, stock index futures trading has basically the same characteristics and processes as ordinary commodity futures trading. Stock index futures are a kind of futures, which can be roughly divided into two categories, commodity futures and financial futures.
Long position means that investors are optimistic about the stock market and expect the stock price to be bullish, so they buy the stock at a low price and sell it when the stock rises to a certain price to obtain the difference income.
Short position: Although the stock price is relatively high at present, investors are not optimistic about the stock market prospect and expect the stock price to fall, so they sell the stock at a relatively high price and buy it when the stock falls to a certain price to obtain the difference income.
Lightening positions refers to selling a part of the stocks held, which is an operation to take out a part of profits to close positions when the market outlook is uncertain.
Closing position refers to the behavior of futures traders to buy or sell futures contracts with the same variety, quantity and delivery month, but in the opposite direction, and to close their positions. Simply put, it means "sell what you bought and buy what you sold (short)."