News for hackers. Stuff that matters.
Re:Class Action Lawsuit Filed Against Robinhood by psychlops on Thursday January 28, 2021 @03:29PM (#25948635)
They didn't. It was TD, Interactive Brokers, and Robinhood. Maybe more by now, but they acted alone.

My guess is that market makers that these brokers sell orders to said no. Brokers make a lot of money selling retail orders to someone else.

Re:Class Action Lawsuit Filed Against Robinhood by sakopov on Thursday January 28, 2021 @03:48PM (#25948967)
It's anecdotal but ETrade, TD, Ally Financial all started blocking buy orders at seemingly the same time - yesterday morning shortly after market open. The reason I know this is because I was on the phone with a friend at 9am Central and neither him nor I were able to purchase $GME, $BB or $GMC (he's on Ally and I'm on Etrade). Around the same time I started seeing messages on social media that TD was also blocking traders. I think you're right that the order likely came from MMs and everyone followed through.
Re:Class Action Lawsuit Filed Against Robinhood by Avalaxy on Thursday January 28, 2021 @05:27PM (#25950345)
Trading212 was also halting trading.