S&P 400 Index

Business, Legal & Accounting Glossary

Definition: S&P 400 Index


S&P 400 Index


Full Definition of S&P 400 Index


The S&P 400 Index is an equity index representing 400 mid-sized companies in various industries. The S&P 400 Index is also called the S&P MidCap 400 Index. The S&P 400 Index was launched in 1991. The S&P 400 Index is a benchmark for valuing companies too small to be included in the S&P 500 Index but too large to be included in the small-cap S&P 600 Index. The S&P 400 Index represents over 7% of the entire U.S. equity market. The S&P 400 Index is weighted by market capitalization. The S&P 400 Index includes mid-cap stocks with market capitalizations ranging from about US$1.5 billion dollars to about US$5.5 billion. To be included in the S&P 400 Index, a company must be a US company with strong financials (i.e. as reported earnings must be positive for 4 quarters in a row). An S&P 400 Index company must have good liquidity. An S&P 400 Index company must also be an operating type of company (i.e. no holding companies for example but REITs are allowed). The S&P 400 index is calculated by Standard and Poor’s in accordance with published specifications. The S&P 400 Index is reconstituted on an as-needed basis by S&P economists, index experts, and members of the S&P Index Committee. In 2005, Standard and Poor’s developed sub-indices to the S&P 400 Index. The S&P 400 sub-indices are part of the SP/Citigroup Style index series. The S&P 400 sub-indices are listed as SP Composite 400/Citigroup growth and value indices and S&P Composite 400/Citigroup pure growth and pure value indices. Various Exchange-traded Funds (ETF), futures, options, and mutual funds offer investment vehicles to trade the S&P 400 Index.


Cite Term


To help you cite our definitions in your bibliography, here is the proper citation layout for the three major formatting styles, with all of the relevant information filled in.

Page URL
https://payrollheaven.com/define/sp-400-index/
Modern Language Association (MLA):
S&P 400 Index. PayrollHeaven.com. Payroll & Accounting Heaven Ltd.
April 19, 2024 https://payrollheaven.com/define/sp-400-index/.
Chicago Manual of Style (CMS):
S&P 400 Index. PayrollHeaven.com. Payroll & Accounting Heaven Ltd.
https://payrollheaven.com/define/sp-400-index/ (accessed: April 19, 2024).
American Psychological Association (APA):
S&P 400 Index. PayrollHeaven.com. Retrieved April 19, 2024
, from PayrollHeaven.com website: https://payrollheaven.com/define/sp-400-index/

Definition Sources


Definitions for S&P 400 Index are sourced/syndicated and enhanced from:

  • A Dictionary of Economics (Oxford Quick Reference)
  • Oxford Dictionary Of Accounting
  • Oxford Dictionary Of Business & Management

This glossary post was last updated: 5th February, 2020 | 0 Views.