The Robinhood situation seems to be broadly misunderstood. Rather than a sketchy back door deal between Citadel and Robinhood, this resulted from the antiquated 2-day settlement period to clear trades. The time lag generates credit risk which is covered through collateral requirements. With the spike in 2 day VaR and single security Gap Risk from GameStop, massive collateral calls from DTCC forced Robinhood to throttle trading (for new buys but not derisking sells). Solution: immediate settlement via BSV powered exchanges such as TDXP.