Matt Levine lays out pretty clearly what happened and liquidity requirements is a lot closer than your assumed conspiracy: https://www.bloomberg.com/opinion/articles/2021-01-29/reddit...
How do you mean? I don't quite understand in this context.
RH wasn't the only broker to suspend trading in GME et al. Are all of the other brokers as equally beholden to Citadel?
EDIT: I'd be more happy to believe in the possibility of a conspiracy at the DTCC level, but even then the logic seems fairly sound for collateral issues here.
There's a perfectly rational explanation for what happened yesterday that is backed up with an understanding of how the financial system actually not works, not the pretense that is usually pretended by the public, and that doesn't involve a nefarious scheme to manipulate the market. Don't let your desire to vilify Robinhood and the financial system in general blind yourself from evidence to the contrary.
Let's be fair: it only occurred on zero-commission platforms (Fidelity had no problems, for example) that sell their order flows to hedge funds -- some of which specialize in shorting. Is it really likely that they just all experienced "liquidity issues" at the same time and had to block just the buying of $AMC and $GME at the same time?