220.127.116.11. Market Center Order Entry
Nasdaq designates market hours and system hours for placing orders on its system. Market hours are 9:30 a.m. to 4:00 p.m. ET. System hours are 4:00 a.m. to 8:00 p.m. ET.
The period from 4:00 to 9:30 a.m. is considered pre-market hours, and the time from 4:00 to 8:00 p.m. is known as after-market hours. Trading activity