This One Weird Number Explains Everything: DataTrek's Colas

Nick Colas, Co-Founder of DataTrek Research and Bloomberg Opinion columnist, on what's behind the volatile trading week and why the market hasn't yield the long-term results that investors expected. Dr. Sam Natapoff, President of Empire Ventures, on why the UK will see a second referendum on Brexit. Erik Wasson, congressional reporter for Bloomberg, on what's next for the government shutdown.