The value of the S&P 500 Index is constantly changing. Learn how the S&P 500 is calculated using a free-float market capitalization-weighted methodology.

A price-weighted index is a stock market index where each stock makes up a fraction of the index that is proportional to its price per share.

As an example, GGP gained 796% and AHT increased by 300% through the 2008-2009 period; returns that were appropriately measured in the enterprise value weighted indexes and not captured by the ...

What Is a Stock Index? A stock index is a collection of stocks intended to be reflective of the stock market as a whole or, in some cases, a particular ...

When it comes to investing, two common methods of portfolio construction and index strategies are value-weighted and market-cap weighted approaches. Both of these strategies offer unique ways of ...