Speculation is the act of buying and selling to take advantage of market spreads to make a profit based on a judgement of the market.

Bitcoin, the "granddaddy" of the world's cryptocurrencies, was launched to the public in 2009 by a developer or group of developers known anonymously as Satoshi Nakamoto.

It is often said that the arbitrage principle of stock index futures and spot index refers to the trading strategy of investing in stock index futures contracts and corresponding packages of stocks to seek profits from the price differences of the same group of stocks in the futures and spot markets.

A stock index is an index of stock prices. It is an indicative figure compiled by a stock exchange or financial services institution to show the movement of the stock market.

Futures, abbreviated as SPIF in English, refers to stock price index futures, also known as stock price index futures and futures, and refers to standardized futures contracts with stock price index as the subject matter. Both parties agree that the target index can be bought and sold according to the size of the stock price index determined in advance on a specific date in the future. Dayou Stock Index Futures Analyst Net points out that the two sides are trading the stock index price level after a certain period of time, and the delivery is carried out through the cash settlement difference. As a type of futures trading, stock index futures trading and general commodity futures trading have basically the same characteristics and processes. Stock index futures are a kind of futures. Futures can be roughly divided into two categories: commodity futures and financial futures.

The full name of stock index futures is stock price index futures, which can also be called stock price index futures and futures index. It refers to the standardized futures contract with stock price index as the subject matter. Both parties agree that the target index can be bought and sold according to the size of the stock price index determined in advance on a specific date in the future. As a type of futures trading, stock index futures trading and general commodity futures trading have basically the same characteristics and processes.