Russell 3000 index

The Russell 3000 Index is a collection of 3,000 of the largest publicly traded companies in the U.S., representing about 98% of the U.S. stock market's total value. It provides a broad snapshot of the overall U.S. stock market’s performance, including large, medium, and small companies. Investors use it to gauge how the market is doing and to help diversify their investments. The index is maintained by Russell Investments and is a popular benchmark for investment funds aiming to match or beat the market.