What issues does it create if your whole client base suddenly want to buy GME?

I guess if volumes overall go up a lot, you might need to post more capital? But since your revenue should be up too, that's a good thing right? And its only for a while, I don't think anyone thinks this will go on for months do they?

And surely it's easier for your clearing house to clear 1 name than 10,000 names?

For no-frills, long, equity positions, it feels like it should be the easiest thing in the world to do. I'm happy to be corrected, I'm aware back office logistics is a dark art so maybe I and other readers can learn something?

Edit: I'm honestly not trying to be snarky here. I just don't get why it would be that big of a problem. I'd be happy to be rescued from my ignorance.