Why Carnival Corporation, Royal Caribbean, and Norwegian Cruise Line Stocks All Just Bounced Back

Cruise line stocks Carnival Corporation (NYSE: CCL) (NYSE: CUK), Royal Caribbean (NYSE: RCL), and Norwegian Cruise Line Holdings (NYSE: NCLH) tumbled in tandem yesterday, apparently hurt (we guess?) by investor worries about Major League Baseball's decision to postpone some games. There have been reports of coronavirus infections among baseball players, and so the theory seems to be that it's not a good idea to gather large groups of people together in one single, contagious location.