Then why disable buying and not selling, if things were volatile the exchange could have stepped in and stop the trading. There was really no reason for DTCC to increase the margin to 100%.
They disabled buying because they need to put up collateral on buys, not on sells (on sells you just pledge the shares you hold). They increased collateral because if a bunch of people buy and go bust by the time settlement time hits (because of GME price collapse) then dtcc would be on a huge hook.
> They increased collateral because if a bunch of people buy and go bust by the time settlement time hits
No that is not true, there are many people who have the money in the account to buy, the broker can lock that money so the question of buyer not paying does not arise.
So the hedge funds are free to do anything yet the little guy who has the money cannot even participate. Do you understand why people think its a rigged system?