Disney, Apple, and NVIDIA are some of today's stocks: Pro Market Movers Mar. 21

Jim Cramer, Stephanie Link of Hightower Advisors, Sylvia Jablonski of Defiance ETFs, Shannon Saccocia of Boston Private, Tristan Gerra of Baird, Joe Terranova of Virtus Investment Partners on why they are buying, selling, or holding specific stocks and ETFs.