Russell 3000 is a market capitalization-weighted equity index.
It measures the performance of the 3,000 biggest publicly traded companies in the United States, which account for about 98 percent of all US incorporated stocks.
Large Cap stocks in this index tend to drive the index’s performance, which is a restriction in reflecting the US stock market’s overview.
Subsets of the Russell 3000 index are the Russell 1000 and Russell 2000.
