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Re:Robinhood is limiting purchases of stocks: AMC, Blackberr... by warkdarrior on Thursday January 28, 2021 @12:57PM (#25945811)
If SEC decides at some point that this was pump-and-dump scheme (even crowdsourced), the Citadel may become liable for enabling that scheme, even if they do not run it themselves.
Re:Robinhood is limiting purchases of stocks: AMC, Blackberr... by cameldrv on Thursday January 28, 2021 @01:36PM (#25946651)
It seems unlikely to me that Citadel would be liable. They're just processing bulk transactions -- they have no direct contact with customers. You could just as well blame the NYSE.
Re:Robinhood is limiting purchases of stocks: AMC, Blackberr... by ethbr0 on Thursday January 28, 2021 @04:13PM (#25949294)
They were just processing bulk transactions.

If it's true they refused to process for certain securities for their downstream clients, then I believe "When?" and "Why?", specifically in relation to other actions, become legally relevant questions.

Re:Robinhood is limiting purchases of stocks: AMC, Blackberr... by whimsicalism on Thursday January 28, 2021 @12:59PM (#25945871)
I think it is much more likely that Robinhood is liable than the liquidity provider for Robinhood.