The S&P 500

The S&P 500 should need no introduction. Although the Dow Jones Index came first, the S&P 500 is pretty much the gold standard when it comes to market indices. Five hundred fundamentally solid companies spread across every sector of the economy. It's definitely the starting point when it comes to stock market analysis:

And, here is the S&P 500 on a change basis:

Please note that charts need a moment to load as there is a significant amount of data processing.