S&P 100
| Foundation | June 15, 1983 |
|---|---|
| Operator | S&P Dow Jones Indices |
| Exchanges | |
| Trading symbol |
|
| Constituents | 101 |
| Type | Large-cap |
| Market cap | US$36.9 trillion (as of December 31, 2024) |
| Weighting method | Free-float capitalization-weighted |
| Related indices | S&P 500 |
| Website | S&P 100 |
The Standard and Poor's 100, or simply the S&P 100, is a stock market index of United States stocks maintained by Standard & Poor's.
The S&P 100 is a subset of the S&P 500 and the S&P 1500, and holds stocks that tend to be the largest and most established companies in the S&P 500. However, the S&P 100 actually includes 101 larger US company stocks due to holding two different share classes of Alphabet Inc.
Constituents of the S&P 100 are selected for sector balance and represent nearly 71% of the market capitalization of the S&P 500 and 61% of the market capitalization of the U.S. equity markets as of December 2024.
Index options on the S&P 100 are traded with the ticker symbol "OEX". Because of the popularity of these options, investors often refer to the index by its ticker symbol.