But the chance of an eventual margin call is almost certain in the long run (as has happened here).
It’s time to talk ethics in tech, this was a design decision to not unwind this once the user was embedded or otherwise clarify this upfront.
Margin call risk totally must be disclosed and is legally required (in Australia where I am) to be disclosed by any investment professional you paid to setup this sort of arrangement. I’d be fairly confident the same applies to US investment advisers.
It’s totally the sort of ‘feature’ that the user could have been advised of around say the 30 day mark. “We’ve set you up a margin account that’s valid for your first $1000, please now confirm if you’d like to continue to carry a margin call risk otherwise were converting you to a standard account.”
It’s also super common for margin facilities to allow investors carrying the risk, 24-48 hours to contribute to retain the position, auto-selling out is a last resort.
All that is exchanged during the day are IOUs (debt) and if one player in the chain goes bankrupt during the day the central bank might cover its debt up to some limit.
We haven't had any major crisis since those instant pay apps were put into place. So those aren't really battle tested systems and I guess we'll only effectively discover how resilient they are during the next crisis...
And we're actually half a decade behind most of Asia and Europe.
If the investment dropped far enough.. say to $12,000, the margin call facility works like this.
It considers the remaining money is always the lenders, so now the lender is exposed for $10,000/$12,000 eg 83% of the exposure is theirs.
They then ask you to top back up your contribution so they are less exposed (within 24-48hrs), or they auto-sell stock to ensure they are not exposed further.
In the case of Robinhood, the margin lending arrangement is always fully backed once the cash is processed. Which I’m guessing is always reliably a few days after it’s deposited.
So it’s crazy to trigger margin calls as all the debt is quickly fully backed.
It would be expected that Robinhood would have negotiated an instrument that never left them with margin calls on cash contributions like this. This is totally on them.
The difference between the credit risk and the margin loan is that in the vast majority (say > 99%) of times the credit risk does not become a loan. You don't need to punish all the people acting in good faith for the action of a few. The regulation on free riding comes from a money supply perspective. You are not allowed to create money without taking out a loan.