Don't You Dare Buy the Cheapest Cruise Line Stock

They say you get what you pay for, and that's pretty apparent when it comes to cruise line stocks. Stack up Norwegian Cruise Line (NYSE: NCLH) against larger rivals Royal Caribbean (NYSE: RCL) and Carnival (NYSE: CCL) -- and even river cruise leader Viking Holdings (NYSE: VIK) for good measure -- and one of them stands out for its low relative valuation. Pick a metric, any metric. Norwegian is, in theory, the cheapest. But that doesn't make it the best stock. You could have said that a year ago, too. How ...