Nasdaq files with SEC to extend stock trading to 23 hours per day, five days a week

Nasdaq has submitted a proposal to the U.S. Securities and Exchange Commission to expand trading in stocks and ETPs from 16 to 23 hours per day across five weekdays. The plan details a day session from 4 a.m. to 8 p.m. ET, a one-hour pause, and a night session from 9 p.m. to 4 a.m. The trading week would open Sunday 9 p.m. ET and close Friday 8 p.m. ET.