The S&P 500, or the Standard and Poor's 500, is a U.S. stock market index based on the market capitalizations of 500 of the largest companies having common stock listed on the NYSE and NASDAQ stock exchanges. It is one of the most commonly followed equity indexes, and it is a fair representation of the value of the U.S. stock market as a whole.
The S&P 500 is a capitalization-weighted index in that the weight of each company's stock price is determined by the total market value of that company's outstanding shares. This means that as the price of one particular stock increases, that stock price is weighted more heavily in the calculation of the index.
Current Stock Markets
|October 21, 2014 (Close of Day)|
|US S&P 500||1,941.28 +1.96%|
|Japan Nikkei 225||14,804.28 -2.03%|
|China Shanghai Comp||2,339.66 -0.72%|
|UK FTSE 100||6,372.33 +1.68%|
|German DAX||8,886.96 +1.94%|
|Brazil Ibovespa||52,432.43 -3.44%|