He likely did a credit spread and one of the options exercised early. Robinhood shows that you owe $x, but if you look closer you have another option that guarantees that you'll get the stock to cover it, you just have to email robinhood support and tell them to exercise that option too. Very sad that he likely didn't even owe that $700k, just misunderstood the UI in his panic.

https://www.reddit.com/r/RobinHood/comments/9guf3n/doh_some_...

ah the follies of American-style options...

Robin Hood has various tricks allowing your buying power to be inflated artificially, there have been a bunch of reports about it.

It also appears RH users get margin accounts by default, at least from everything I've read. If that's true, it's probably the real problem.

In the EU retail traders are permitted access to margin, but brokers are required to eat any loss exceeding the value of the account. It's not enough, because it still means new "traders" are exposed to amplified volatility, thus ensuring their accounts will blow out much faster than they may have otherwise, and positions that might have recovered in a cash account get margin called and closed out at the worst possible moment.

Leverage/margin access should require similar levels of study as a private pilot's license

> It also appears RH users get margin accounts by default, at least from everything I've read. If that's true, it's probably the real problem.

No, you have to explicitly opt-in to it.

Nope

You have to upgrade to Robinhood Gold (which is free for the first month, then $5 a month thereafter).

If and when you open a Robinhood account you have to opt-in to gold to be able to invest with margin.

https://robinhood.com/us/en/support/articles/overview/

RH doesn’t let you short naked calls, you have to hold shares as collateral, I’m not sure what happened.

Options spread.

Might be due to margins - i.e. buy/sell options with money borrowed from Robinhood.

You can't trade options on margins.

They probably ran up something like +$150k+ and then kept pushing it, used all margin to get multiples of this amount which went bad shortly thereby going deeply negative.

Live by the sword, die by the sword.