‘Why Does the Stock Market Have Pre-Market and After-Hours Trading?’

By NEIL IRWIN from NYT Times Insider http://ift.tt/2jZy5yr
via IFTTTA reader asks: “If trades can occur outside the 9:30 a.m. to 4 p.m. market hours, then why not allow for 24/7 trading?” Neil Irwin, a senior economics correspondent, responds. January 18, 2017 at 12:00AM