Institutional investors don't use Robinhood. But yes, they were able to buy & sell $GME. However, anyone with a Fidelity account could also. Fidelity has the

Institutional investors don't use Robinhood. But yes, they were able to buy & sell $GME. However, anyone with a Fidelity account could also. Fidelity has the liquidity to handle a system shock, unlike Robinhood / Webull / various others.