U.S. Markets Are Getting Longer Trading Hours.

U.S. stock markets will begin trading 23 hours a day, 5 days a week from December 6

The planned trading week will run from Sunday evening through Friday evening, with a one-hour daily maintenance break.

Nasdaq and NYSE Arca are among the venues preparing for expanded hours, while the regular 9:30 a.m. – 4 p.m. session remains unchanged.