Tesla, UnitedHealth, and ON Semiconductor are some of today's top picks: Pro Market Movers Jan. 3

Jim Cramer, Kari Firestone of Aureus Asset Management, Delano Saporu of New Street Advisors, Dan Ives of Wedbush, Joe Terranova of Virtus Investment Partners, Jon Najarian of MarketRebellion.com, Jenny Harrington of Gilman Hill Asset Management, Liz Young of SoFi, and Steve Weiss of Short Hills Capital explain why they are buying, selling, or holding specific stocks and ETFs