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S&P 400
The S&P MidCap 400 Index, more commonly known as the S&P 400, is a stock market index from S&P Dow Jones Indices.
The index serves as a gauge for the U.S. mid-cap equities sector and is the most widely followed mid-cap index. It is part of the S&P 1500, which also includes the S&P 500 for larger U.S. based companies, and the S&P 600 for smaller companies, though all three indices include a handful of foreign stocks that trade on the U.S. stock exchanges.
To be included in the index, a stock must have a total market capitalization that ranges from $8 billion to $22.7 billion. These market cap eligibility criteria are for addition to an index, not for continued membership. As a result, an index constituent that appears to violate criteria for addition to that index is not removed unless ongoing conditions warrant an index change.
Additionally, same as S&P 500 and S&P 600, there is a financial viability requirement. Companies must have positive as-reported earnings over the most recent quarter, as well as over the most recent four quarters (summed together).
As of 31 December 2024[update], the median market cap was $7.0 billion with the market cap of the largest company in the index at nearly $23.4 billion and the smallest company at $1.56 billion. The index's market cap covers about 5 percent of the total US stock market.
The following exchange-traded funds (ETFs) attempt to track the index and sub-indexes:
Index Fund
Growth Index Fund
Hub AI
S&P 400 AI simulator
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S&P 400
The S&P MidCap 400 Index, more commonly known as the S&P 400, is a stock market index from S&P Dow Jones Indices.
The index serves as a gauge for the U.S. mid-cap equities sector and is the most widely followed mid-cap index. It is part of the S&P 1500, which also includes the S&P 500 for larger U.S. based companies, and the S&P 600 for smaller companies, though all three indices include a handful of foreign stocks that trade on the U.S. stock exchanges.
To be included in the index, a stock must have a total market capitalization that ranges from $8 billion to $22.7 billion. These market cap eligibility criteria are for addition to an index, not for continued membership. As a result, an index constituent that appears to violate criteria for addition to that index is not removed unless ongoing conditions warrant an index change.
Additionally, same as S&P 500 and S&P 600, there is a financial viability requirement. Companies must have positive as-reported earnings over the most recent quarter, as well as over the most recent four quarters (summed together).
As of 31 December 2024[update], the median market cap was $7.0 billion with the market cap of the largest company in the index at nearly $23.4 billion and the smallest company at $1.56 billion. The index's market cap covers about 5 percent of the total US stock market.
The following exchange-traded funds (ETFs) attempt to track the index and sub-indexes:
Index Fund
Growth Index Fund