The markets were off to a rocky start in the new year with the Dow dropping triple digits at the open. Tesla shares plunged after the company announced it missed Wall Street estimates on deliveries for the last quarter of 2018. It also plans to cut prices on its Model S, Model X, and Model 3 cars to offset the reduction in a federal tax credit. Plus, we chat with Nutrisystem CEO Dawn Zier about wellness week and health trends for 2019.