There are three major stock indexes in the United States: Dow Jones index, Nasdaq index and Standard & Poor's 500 index. Mainly through software to analyze and view. Plus the question behind you. You can visit the official website of State Street Investment (Hong Kong) Limited. They have daily updates on the official website. There are two kinds of their software, one is PC version, which is to be used in official website, and the other is web version, which can be accessed directly. Cut a picture:

The other is a mobile APP, as follows:

Try it, I hope it can help you!