The selected stocks were the ones causing the financial issues. They didn't shutdown all trading. There wasn't a lot of Robinhood action in IBM, for example, so IBM trading wasn't halted. Also, Robinhood denies the claims that they initiated sells without permission. If these accountholders accusing Robinhood of initiating sales without consent are margin accounts, they probably have language in their margin agreements allowing Robinhood to sell the shares at the company's discretion. Note this warning on the SEC website:
The SEC’s Office of Investor Education and Advocacy is issuing this Investor Bulletin to educate investors about the use of margin accounts to buy securities and their related risks.
www.sec.gov
Recognize the Risks
Margin accounts can be very risky and they are not appropriate for everyone. Before opening a margin account, understand that:
- You can lose more money than you have invested;
- You may have to deposit additional cash or securities in your account on short notice to cover market losses;
- You may be forced to sell some or all of your securities when falling stock prices reduce the value of your securities;
- Your brokerage firm may sell some or all of your securities without consulting you to pay off your margin loan;
- You are not entitled to choose which securities your brokerage firm sells in your accounts to cover your margin loan;
- Your brokerage firm can increase its margin requirements at any time and is not required to provide you with advance notice; and
- You are not entitled to an extension of time on a margin call.
Your collusion argument doesn't seem to hold water. These brokerages would have to be incomprehensibly stupid to collude on equity trades, because there's such a detailed paper trail. Extraordinary claims like this takes evidence, more than "connect the dots". The only two "better funded" brokers that halted trading were TD Ameritrade (owned by Schwab) and Interactive Brokers Group; both only limited options trading.
As for your conspiracy theory about Citadel, I don't know what to say. Citadel is a financial services company, they're a market maker, for example, and they're also a hedge fund company. I'm not a fan of hedge funds at all, but why would Citadel try to force a portfolio company into bankruptcy?