Trump's frustration with Mnuchin rising after failed attempt to calm markets, source says
By Jim Acosta, Kevin Liptak & Donna Borak
Dow dives 600 points to below 22,000, S&P 500 enters bear market — worst Christmas Eve ever
By John Melloy & Michael Sheetz
Dow Falls 650 Points Despite Mnuchin's Bid to Reassure Investors
By Michael Wursthorn & Avantika Chilkoti
Confusing signals from Washington send markets plunging
By Nathaniel Meyersohn & Rich Barbieri