This is because the American stock market can move towards a bull market, and the trend of Nasdaq will be relatively weak, and the decline of Nasdaq will inevitably lead to a sharp drop in Nasdaq.
The Dow generally refers to the Dow Jones index. The Dow Jones index was originally an arithmetic average stock price index compiled by Charles Henry Dow, the founder of Dow Jones Company (0- 1902) in 1884. NASDAQ (National Association of Securities Dealers Automated Quotas), also known as NASDAQ and American Science and Technology Index, is the English abbreviation of the name of the automated quotation system created by the National Association of Securities Dealers in the United States in 1968.