Brokers told retail they couldn't participate in future IPOs if they sell, funds have 15 days to get a hold of a certain percent of their holdings worth of shares, but it's more than there are available. So the shares that are available are going have to keep going up until they are worth the total amount that all the funds based on Nasdaq 100 need in their holdings.
This was designed to be a like a massive short squeeze right out of the gate, tons of forced demand chasing very few shares available.