That's entirely possible and even likely, but that's still a huge market failure that should be corrected. You can't have a situation like this happening to some stocks exclusively.
Where were those increases in required DTC collaterals when TSLA/NIO/your favorite SPAC was going through the roof? The conspiracy just moves to whoever unilaterally decided to raise collateral requirements from 2% to 100% -- a 4900% increase, and nice and whole numbers that seem fully arbitrary. A situation in which people have settled in their accounts should not depend on some backdoor credit wizardry that ultimately damages retail investors.
Where were those increases in required DTC collaterals when TSLA/NIO/your favorite SPAC was going through the roof? The conspiracy just moves to whoever unilaterally decided to raise collateral requirements from 2% to 100% -- a 4900% increase, and nice and whole numbers that seem fully arbitrary. A situation in which people have settled in their accounts should not depend on some backdoor credit wizardry that ultimately damages retail investors.