Robinhood almost imploded during the GameStop meme stock chaos [pdf]
financialservices.house.gov
financialservices.house.gov
To me that implied they were at risk.
It may not have been an immediate existential threat but to me it is close enough that I would consider it really bad.
Margin is leverage and is like buying stocks and paying with your credit card.
On the morning of January 28, 2021, Robinhood had approximately $696 million in collateral already on deposit with the NSCC, leaving it with a collateral deficit of approximately $3 billion, which it was required to post to satisfy the NSCC’s clearing fund requirement or risk being in violation of the NSCC’s rules and potentially losing the ability to clear trades for their customers altogether.