There was someone claiming to be a robin hood employee, that the White House got involved. Obviously I would take this with an extreme pinch of salt but with those numbers there is every motivation from the powers that be
Could it be that other trading platforms use the same clearing firm?
For a small brokerage, they would have to work with other brokerages to help them trade, as they wouldn't have enough shares they already hold to trade them within their users. So Robinhood asks Apex for more shares, and Apex has to ask HSBC/Fidelity/JPMC/Goldman if Apex doesn't have any. At some point, all the other institutions also don't want to give up their shares because they need to satisfy demand from their own users. Trading with other firms tends to be really slow too.
It's a short squeeze too, by definition there's not enough stocks available for everyone who wants to buy. So some firms ran out and couldn't get more.
Same with doing your own clearing, there's complexity involved with clearing and maybe you don't want to implement it all yourself when someone does it better for cheaper.
It's like asking why we don't all program in assembly all the time, or even have the option to mix assembly into our high level code. It's just nice having layers of abstraction that handle the annoying stuff for you, even if there's a minor cost. Why have complexity you don't expect to need?
That's... not how stock markets work. For every buy there must be a seller. If there are too many buyers but not enough sellers the price simply goes up.
https://blog.robinhood.com/news/2018/10/9/introducing-cleari...
Jesus, it kind of shows how corrupt the US really is. We're all basically watching a bunch of people commit crimes that from my quick Google carries a max sentence of 10 years with billons of dollars on the line and we're all pretty sure they're going to get away with it.
Though, I do think if Biden makes sure the justice hammer comes down on this, it'll win over a bunch of Trump supporters.
[1] https://www.reuters.com/article/us-gamestop-melvin-idUSKBN29...
I'm not sure anyone who still can be considered a “Trump supporter” is swayable; on the other hand, if Biden is seen as politicizing prosecutorial decisiones it’ll lose a bunch of Biden supporters.
It's also questionable how much influences Biden’s preferences have at Justice since his AG nominee hasn't been confirmed and everyone at levels requiring Senate confirmation there is a Trump carryover (though, to be fair, the Acting AG was appointed from within by Biden and wasn't out of order of seniority, IIRC, so he has exert what influence he can to select leadership given the constraints he faces.)