Closing Bell: November 20, 2018

The markets drop and the Dow erases gains for 2018, closing more than 500 points. Bitcoin and other cryptocurrencies also take a dive. Facebook faces more calls for new leadership. Plus, a new edition of Cheddar Cannabiz. As two cannabis companies make their debut on the Canadian Securities Exchange, the country is facing a marijuana shortage one month after legalization. Nik Decosta-Klipa, staff writer at Boston.com, recaps day one of recreational marijuana sales in Massachusetts. George Allen, president of Acreage Holdings, and Frank Knuettel II, CFO of MJardin Group, discuss trading in Canada and the state of the industry moving forward. And Khurram Malik, CEO of Biome Grow, explains what factors may have played into Canada's supply issues.