A stock index
the 3000 U.S. stocks
with the highest market capitalization
. The list
is updated yearly, during a process known as reconstitution
. There are two sub-indexes which are based on the Russell 3000: the Russell 1000, which follows the 1000 stocks with the largest market capitalization values
, and the Russell 2000
, which follows the remaining 2000 stocks, those with the smallest values.