The Russell 2000 is a stock market index comprised of 2,000 companies that have small market capitalizations. A small-cap stock is generally any security of a publicly traded company whose market value is between $250 million and $2 billion. The Russell 2000 is regarded as a bellwether of the U.S. economy as it includes a large number of smaller companies based throughout America.While it has dominated periodically, the Russell 2000 has lagged the performance of other indices for a long-time. In the last fi ...