If a trader places an MOC order that should have been hit, does the Specialist ever not fill the order or fill it at a price that is worse than the opening print?
MOC is a market order, so as long as it's in on time you are guaranteed a fill. Has to be submitted no more than 20 minutes before the close. The price you get will have nothing to do with where the stock opened.
Quote from 777:
If a trader places an MOC order that should have been hit, does the Specialist ever not fill the order or fill it at a price that is worse than the opening print?