Why Carnival, Royal Caribbean, and Norwegian Cruise Line Stocks Are Bouncing Back Today

News reports that Carnival Corporation (NYSE: CCL) (NYSE: CUK) subsidiary AIDA Cruises is canceling planned early-August trips due to a lack of preapproval from the Italian government, that the Norwegian cruise ship MS Roald Amundsen is reporting 43 coronavirus infections aboard, and that Norway is restricting cruises for the next 14 days while it investigates the outbreak, reminded investors that all is still not well in the industry. The news sent shares of Carnival -- and Royal Caribbean Cruises (NYSE: RCL) and Norwegian Cruise Line Holdings (NYSE: NCLH), too -- down sharply in response.