if a retail customer not using DOT or super DOT but just sending an order direct to NYSE specialist enters a limit order , not MOC , to buy an NYSE name is it within the rules for the specialist to fill him shortly after 4 pm EST? I got late fills between 4 - 406 pm approx ... am not complaining as I wanted a fill , but am curious if this is ok
Yes. That is within the bounds of the rules. Edit: That is, assuming the order was put in near the close. Obviously, if someone puts a limit order in at 3pm and gets a fill an hour later there's most likely a problem! You do mean by the close, yes?