[anonymousDan]

But what if there aren't enough people willing to sell at the closing price to get all the shares you need?

[infinite8s]

Then you don't get all the shares you need. It's a marketplace like any other with slightly more complicated rules. Nothing magical about it.

[anonymousDan]

Right, that was kind of my point as the parent seemed to be implying you could perform an arbitrary amount of trades at the closing price and would be somehow magically guaranteed to fill the orders. Or at least that's how I read it. Interesting discussion nonetheless.