Consumer discretionary could be this reconstitution's biggest loser, while tech, financials and health care are likely to gain influence in the small-cap gauge. Using GICS sector classifications and June 22 market cap, discretionary is poised to lose eight companies to the Russell 1000, comprising $96.8 billion in market cap headlined by Caesars, GameStop, and RH. Conversely, the sector is set to gain 37 companies, by our count, that are only worth $46.1 billion. Health care could have the most new entrants at 84 -- though netted against the seven losses means only $23.7 billion in market cap would be entering the Russell 2000. Tech ($40.6 billion) and financials ($33.8 billion) could have the largest net market-cap gains.