At the stock exchange, when everyone is standing around yelling, how do they keep track of what's going on.

Question

For that matter, say like in a fight, when a bookie is walking around taking bets and fifty people are yelling at him, how does he remember who bet what on what, etc. I've seen these scenarios a hundred times in movies but never understood how they work. Thanks

Answer 1

In the cases of the exchanges, they write them down or electronically record them. Depending upon the exchange, they also maintain runners and people whose job is to record deals into the system.