The full name of the Dow Jones Industrial Average, or Dow for short, includes the 30 largest and most famous listed companies in the American stock market. The full name of Nasdaq Index is Nasdaq Composite Index, referred to as "Nasdaq Composite Index", which is a comprehensive index reflecting the market situation of Nasdaq Exchange. This index includes more than 5000 listed companies. In addition, there is the Standard & Poor's 500, the Standard & Poor's 500 Index, which is composed of the 500 companies with the largest market value and the best liquidity in the American stock market. Like the Dow Jones index, the S&P 500 covers two American stock exchanges, but contains more stocks than the former. I Dow Jones Industrial Average The Dow Jones Industrial Average (hereinafter referred to as "Dow Jones") is a stock market index founded by charles dow, the co-founder of The Wall Street Journal and Dow Jones Company, and named after him and his business partner and statistician Edward Jones. The Dow Jones Industrial Average is not a weighted arithmetic average, which does not represent the market value of its constituent companies, but the average value of one share price of each constituent company. It is a price-weighted measure of the stock market index of 30 famous companies listed on the American stock exchange. 2. NASDAQ 100 Index NASDAQ 100 Index is a stock market index composed of the largest local and international non-financial listed companies in the United States 100. It is based on market value and uses some rules to balance the influence of shares with larger market value. Unlike the Standard & Poor's 500 Index and Nasdaq Composite Index, there are no financial institutions in the constituent stocks. Nasdaq 100 Index, Dow Jones Industrial Average, Standard & Poor's 500 Index and Russell 2000 Index are the most important stock indexes in the United States. All four major indexes have standard, mini and micro futures/options for investors to trade. Third, the difference between Dow Jones and Nasdaq index 1. The corresponding companies are different. The publishing company of Dow Jones index belongs to Dow Jones Company of Standard & Poor's, and Nasdaq belongs to NASDAQ Exchange. 2. The contents of the two are different. The Dow Jones index selects representative companies, so it only contains 30 stocks, while the Nasdaq contains many companies in new technology industries, so it is as high as more than 5,000. 3. The calculation method is different. The calculation method adopted by Dow Jones is the mathematical unweighted arithmetic average method, not the ordinary average calculation method, and the Nasdaq index belongs to the comprehensive average method. The calculation methods of the two methods are different, and the final numerical reference method is also different.