[bigtunacan]

Citadel is blocking trades on these stocks where Melvin Capital holds shorts for any platform that uses them; Robinhood is just the most prominant among small retail traders.

Citadel "bailed out Melvin Capital" because Citadel essentially owns Melvin and so their loss is our loss sort of situation. Melvin Capital stated they had closed out their short position on GameStop, but those are huge losses to cover no one knows how true that is. There is a lot of rumor that Citadel/Melvin Capital re-bought short positions yesterday before Citadel restricted trades to manipulate the market. If this is true it is highly illegal, but this effectively allow Citadel/Melvin to make back their losses if they can force market prices down.

TL/DR, Citadel/Melvin are breaking the law, all the retail traders are getting fucked, but when this is done Citadel/Melvin ends up having more cash than ever.