The Dow Jones Index, or Dow Jones Stock Price Average, is the most influential and widely used stock index in the world. It takes a part of representative company stocks listed on the New York Stock Exchange as the preparation object, and consists of four stock price average indexes, namely: ① Dow Jones Industrial Stock Average Index, which is compiled based on the stocks of 30 famous industrial companies; ② Dow Jones Transportation Stock Price Average Index, which is based on the stocks of 20 famous transportation companies; ③ The Dow Jones average utility share price index, which is compiled based on the stocks of 15 famous utility companies; ④ The Dow Jones composite average stock price index is compiled based on the shares of 65 companies involved in the above three stock price average indexes. Among the four Dow Jones stock indexes, the Dow Jones Industrial Average is the most famous. It is widely reported by the mass media and quoted as the representative of the Dow Jones Index. Dow Jones Index is compiled and published by Dow Jones Company, an American newspaper group, and published in its subordinate Wall Street Journal. The Dow Jones Index was first published in history on July 3, 1844. The index sample at that time included 11 stocks, which were compiled by Charles Henry Dow, one of the founders of Dow Jones and the first editor of the Wall Street Journal (1851-1902). Since October 1, 1928, the number of sample shares has increased to 30 and has remained so far, but the company as a sample share has undergone many adjustments. The Dow Jones index is an arithmetic average stock index. The calculation formula is: Average stock price=sum of selected stock prices/number of selected stocks The role of Dow Jones Index is to reflect the overall trend of the U.S. stock market, covering finance, technology, entertainment, retail and other industries. (Editor in charge: Wu Xiaojuan)
