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S&P MidCap 400 Index

Source: Investopedia
This Article has been Edited for Accessibility

S&P MidCap 400 Index

What is 'S&P MidCap 400 Index'

This Standard & Poor's index serves as a barometer for the U.S. mid-cap equities sector and is the most widely followed mid-cap index in existence. To be included in the index, a stock must have a total market capitalization that ranges from roughly $750 million to $3 billion dollars. Stocks in this index represent household names from all major industries including energy, technology, healthcare, financial and manufacturing.

Explaining 'S&P MidCap 400 Index'

Like many other stock market indexes, the S&P 400 MidCap Index is a value-weighted index, meaning that the stocks with the largest market capitalization have the most significant impact on the movement of the index. Similarly, smaller movements in the smallest companies in the index have virtually no effect on the overall movement of the index. This is an important fact to remember for investors seeking diversification, as market-cap weighted index funds primarily expose an investor to the movements of a small group of stocks, despite the broad name of the index itself.


Additional Resources

  1. Performance Evaluation And Self-designated Benchmark Indexes In ... [fisher.osu.edu]
  2. Stock Price Effects Of Changes In The S&p Midcap 400 And The S&p ... [academia.edu]
  3. The Impact Of Inverted Yield Curve On Performance Of Small, Mid, And ... [swer.wtamu.edu]
  4. Asset Management Fees And The Growth Of Finance [umass.edu]
  5. 1 [umich.edu]