S&P Mid-Cap 400 Index
What is the S&P Mid-Cap 400 Index?
How Does the S&P Mid-Cap 400 Index Work?
This index consists of 400 equities. The stocks are chosen based on market capitalization, liquidity and industry representation. The index contains firms that are situated in size between the S&P 500 Index and the S&P Small-Cap 600 Index. It is a market-weighted index, meaning that larger firms have more influence on the index's performance than smaller ones. The average size of a firm in this index is between $1-4 billion. When taken together, the 400 components of the S&P Mid-Cap 400 Index represent about 7% of the total market value of U.S. equities.
Why Does the S&P Mid-Cap 400 Index Matter?
The S&P Mid-Cap 400 Index has historically outperformed its larger sibling, the widely quoted S&P 500. This is due to the fact that smaller firms generally outperform their larger rivals over time. Why is this the case? Well, companies often find it harder and harder to boost revenues and earnings at a fast clip as they grow and mature. Because of this, larger firms tend to grow at a slower pace than their smaller rivals.
Although it has grown in popularity in recent years, the S&P 400 remains largely overshadowed by the S&P 500. Meanwhile, investors who wish to invest in smaller firms usually choose the Russell 2000 or the S&P 600. The S&P Mid-Cap 400 Index is stuck in the middle of the market and is primarily used by fund managers. Because of this lack of visibility, the index is not as liquid as its large-cap peers.
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