 SAN DIEGO, CA, June 07, 2021 GLOBE NEWSWIRE -- GreenBox POS NASDAQ: GBOX GreenBox or the Company, an emerging financial technology company leveraging proprietary blockchain ledger and forthcoming smart contract token technology is set to join the broad-market Russell 3000 and Russell Microcap Indexes at the conclusion of the 2021 Russell indexes annual reconstitution, effective after the US market opens on June 28, according to a preliminary list of additions posted June 4. 