# Sp500 index

### What is the S&P 500 Index?

The S&P 500 Index (formerly Standard & Poors 500 Index) is a market-capitalization-weighted index of the 500 largest U.S. publicly traded companies by market value, The index is widely regarded as the best single gauge of large-cap U.S. equities.

### How do I explore the S&P 500®?

Touch device users, explore by touch or with swipe gestures. The S&P 500® is widely regarded as the best single gauge of large-cap U.S. equities and serves as the foundation for a wide range of investment products. The index includes 500 leading companies and captures approximately 80% coverage of available market capitalization.

### Is the S&P 500 float weighted or float free?

Key Takeaways. The S&P 500 Index or the Standard & Poors 500 Index is a market-capitalization-weighted index of the 500 largest U.S. publicly traded companies. The S&P is a float-weighted index, meaning company market capitalizations are adjusted by the number of shares available for public trading.

### What is the difference between the S&P 500 and MidCap 400?

Related Terms The S&P MidCap 400 is a subset of the S&P 500 and serves as a barometer for the U.S. mid-cap equities sector. A composite index is a grouping of equities or other securities that gives a statistical measure of the relative market or sector performance over time.

### Is the S&P 500 float weighted or float free?

Key Takeaways. The S&P 500 Index or the Standard & Poors 500 Index is a market-capitalization-weighted index of the 500 largest U.S. publicly traded companies. The S&P is a float-weighted index, meaning company market capitalizations are adjusted by the number of shares available for public trading.

### What is the S&P 500 equal weighted index?

The S&P 500 and the S&P 500 Equal Weighted Index use an index divisor that scales the index down to a more manageable and reportable level.

### What is the S&P 500?

A: The S&P 500 is a U.S.market index that gives investors an idea of the overall movement in the U.S.equity market. The value of the S&P 500 constantly changes based on the movement of 500 underlying stocks. The index is computed by weighted average market capitalization.

### How is Apples weighting in the S&P 500 calculated?

The $711.9 billion is used as the numerator in the index calculation. The S&P 500 total market cap was approximately $23 trillion, which is the sum of the market capitalizations for all of the stocks in the index. Apples weighting in the index was 3% and is calculated as follows: $711.9 billion / $23 trillion.