Information on the S&P 500 Stock Index
The S&P 500® Index is widely regarded as the best and most followed single gauge of large-cap U.S. equities. More than $7 trillion is benchmarked to the index, with indexed assets comprising approximately about $2 trillion of this total. The index is capitalization-weighted and includes 500 leading companies and captures approximately 80% coverage of available market capitalization. The S&P 500 index components and their weightings are determined and maintained by S&P Dow Jones Indices.