Dow Jones index is the oldest stock index in the world, and its full name is average stock price index. Generally speaking, the Dow Jones index may refer to the first of the four groups of the Dow Jones Industrial Average.

The Dow Jones index was first compiled by charles dow, the founder of Dow Jones Company, in 1884. Its original Dow Jones stock price average index is based on 1 1 representative railway companies, calculated and compiled by arithmetic average method, and published in the Daily Communication edited and published by charles dow himself. Its calculation formula is:

Average share price = sum of selected stock prices/number of selected stocks.

-Standard & Poor's 500 Index

Standard & Poor's 500 Index, also translated as Standard & Poor's 500 Index, was compiled by Standard & Poor's Company at 1957. The initial constituent stocks include 425 industrial stocks, 15 railway stocks and 60 public utility stocks. From July 1 9761,its constituent stocks were changed to 400 industrial stocks, 20 transportation stocks, 40 public utilities stocks and 40 financial stocks. It takes 194 1 to 1942 as the base period, and the base period index is set to 10. It is calculated by the weighted average method, with the listed amount of the stock as the weight, and the weighted calculation is carried out according to the base period. Compared with the Dow Jones Industrial Average, the Standard & Poor's 500 Index has the characteristics of wide sampling area, strong representativeness, high accuracy and good continuity, and is generally regarded as the ideal target of stock index futures contracts. -Nasdaq stands for the National Association of Securities Dealers Automated Quotation. The rise of information and service industry gave birth to Nasdaq. Nasdaq, founded in 197 1, is a global stock market that completely adopts electronic trading, provides a competitive stage for emerging industries and is self-regulated. Nasdaq is the largest electronic stock trading market in the United States and even the world.