Why Carnival, Royal Caribbean, and Norwegian Cruise Line Stocks All Just Jumped

Tic-tac-toe, three in a row, shares of cruise line stocks Carnival Corporation (NYSE: CCL), Royal Caribbean (NYSE: RCL), and Norwegian Cruise Line Holdings (NYSE: NCLH) all jumped in Friday trading, rising 3.5%, 3.6%, and 4.6%, respectively, through 10:30 a.m. EDT.

And you can thank pharmaceutical giant Merck (NYSE: MRK) for that.

Image source: Getty Images.

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Source Fool.com