Due to the way the US system works they need to put up collateral for each trade for 2 days. And they can't use customer funds for that, has to be their own mon

Due to the way the US system works they need to put up collateral for each trade for 2 days. And they can't use customer funds for that, has to be their own money. So to avoid running out of cash they will limit trading. More details in this Twitter thread: https://twitter.com/KralcTrebor/status/1355172567242469377 https://twitter.com/KralcTrebor/status/1355172567242469377