Oh they do. "On Thursday, Robinhood was forced to stop customers from buying a number of stocks, like GameStop, that were heavily traded this week. To continue

Oh they do. "On Thursday, Robinhood was forced to stop customers from buying a number of stocks, like GameStop, that were heavily traded this week. To continue operating, it drew on a line of credit from six banks amounting to between $500 million and $600 million to meet higher margin, or lending, requirements from its central clearing facility for stock trades, known as the Depository Trust & Clearing Corporation." https://www.nytimes.com/2021/01/29/technology/robinhood-fundraising.html https://www.nytimes.com/2021/01/29/technology/robinhood-fund...