Question: How can I find the percentage weighting of companies in the S&P 500 Index?


The index is weighted by float-adjusted market capitalization. 

Go to the Business Library's Company & Financial Information section for links to useful resources including links to the following suggested resources. 

Standard & Poor's NetAdvantage:  The home screen will provide overview information as well as data on trends and earnings.  Under the S&P 500 Index tab, you will find profile information. The S&P Outlook tab will provide reports. The Quick Screener tab will provide tabs for searching by indices that can be further refined by industry and company data. 

Bloomberg:  Type: SPX for the S&P 500 index < GO>, choose: Equity Index Analysis and WGT Member Weighting.  Go to MEMB, member weights, for the members of an index and its current weightings along with shares and price performance. 

Please note that Bloomberg is accessible in the Bobst Library.  To use this resource, stop by the 5th floor Research Commons.
Go to the NYU Guide, Bloomberg Guide, which has information on the basics for getting started as well as tips, tricks and shortcuts. 

You may want to consult the Standard and Poor’s Index web page.  Index methodology documents can be found on the corresponding index page. Once you navigate to an index page, the methodology can be found in the left column, next to the factsheet. For example, S&P 500


Answered By: Business Librarians
Last Updated: Mar 15, 2022Views:

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