A big Market Sell-Off, Transports tumble, Retail’s rough month, and Regeneron’s race to develop a Coronavirus drug.

A big selloff on Wall Street as investors grow more cautious about the potential impact of the coronavirus. We look at the sectors most impacted. Some of the major U.S. carriers suspending flights to China…we have the details. Plus, a look inside Regeneron’s laboratory where the race to develop a drug for the Coronavirus is on. Learn more about your ad choices. Visit megaphone.fm/adchoices

Om Podcasten

"The Exchange" on CNBC is a one-stop shop for the day's top business stories, along with breaking news and the must-see market movers heading into the back half of the trading day. This newsroom-based program also features lots of original reporting, in-depth conversations and showcases CNBC's award-winning investigative work. "The Exchange" has all that plus "Rapid Fire," our innovative, reporter driven roundtable – which is a discussion of some of the day's most interesting, unusual and at times controversial topics. This series gives today's modern investor the day's top stories, the must reads & a whole lot more.