Earlier quoted context omitted.
I am aware of that, and that is Robinhood being unable to manage their collateral requirements in order to continue trading GME. There were other brokers that managed to do it just fine. Robinhood messed up here. Really I think the DTCC is who messed up, but that's a much larger discussion. The reason I dislike the analogy is because brokers aren't (typically) supposed to run out of shares to buy and sell. Retail tra…
Personally speaking, I blame the customers. They are paying for $0 trades to a very, very small trading firm with well-known trade-execution problems months / years before the GME instance. No serious trader actually trusted Robinhood, and nobody was surprised when Robinhood's trading ability was shown to be so weak in that timeframe. There were many respectable banks with much stronger finances who were able to supp…
Market halts are completely different from what we are discussing. And one of the purposes of market makers is to provide liquidity in extreme cases as you are describing (I'm not saying it works perfectly, but it's one of their reasons for existing).
Anyway, I feel like we aren't quite getting our points across to each other. Not blaming you just saying let's agree to disagree.