I'll go ahead and have my last word: - A clearinghouse cannot halt a market - A clearinghouse's job is to ensure that trades settle, which requires adjusting

I'll go ahead and have my last word: - A clearinghouse cannot halt a market - A clearinghouse's job is to ensure that trades settle, which requires adjusting collateral, which is exactly what they did - A clearinghouse does not honor a trade, the buyer and seller (via their brokerage) do; if there's an increased risk of the trade not being honored, the clearinghouse raises collateral requirements - DTCC controlled the situation the best they could from their end by raising collateral requirements, which is basically all they can do - A market can be functioning perfectly fine even if clearinghouse collateral is at 100% - A clearinghouse doesn't definitionally know what the outstanding short interest is; short positions are on broker's books and it is the broker that reports that data to FINRA, not the clearinghouse - A clearinghouse preemptively "dealing with" with all outstanding options positions (or any position, for that matter) that they (there is not just one clearinghouse) know about boils down to collecting 100% collateral - The OCC clears options, the DTCC (by way of the NSCC) clears equity; the data that the DTCC has regarding options is presumably very limited - A clearinghouse is not going to require 100% collateral because somebody on the internet believes there's going to be a short squeeze - I don't exactly know what you think you think they "don't care" about, but if you're implying that a clearinghouse requiring high collateral to deal with brokers not being able to make good on a trade because of activity on that broker's books is somehow rigging the market, you've completely lost the plot I think you misunderstand what a clearinghouse does.