Cruise stock investors joined in the cheering, and shares of Carnival Corporation (NYSE: CCL), Royal Caribbean (NYSE: RCL), and Norwegian Cruise Line Holdings (NYSE: NCLH) all climbed higher. Basically, the story goes like this: Up until a few days ago, investors were expecting the Fed to raise interest rates 0.5% in an attempt to tamp down rising inflation. (The idea being that when you raise interest rates, people take out fewer loans, buy less stuff, spend less -- and this decrease in demand results in lower prices, and less inflation).