Shares of Carnival (NYSE: CCL) jumped as much as 7.9%, Royal Caribbean (NYSE: RCL) was up 7.3%, and Norwegian Cruise Line (NYSE: NCLH) jumped 6%. What happened Shares of cruise line stocks jumped on Tuesday as there was good news out of the industry and the market speculated the worst of inflation may be behind us. So what The industry-specific news was the Centers for Disease Control and Prevention (CDC) ending a program to track COVID-19 cases on cruise ships.