 After two straight days of gains, cruise line stocks were headed back down today. Whether its Carnivals NYSE: CCL 5.4 decline, Royal Caribbeans NYSE: RCL 5.2 slide, or Norwegian Cruise Line Holdings NYSE: NCLH more modest 4 slump all as of 1:05 p.m. EDT on Wednesday, every major publicly traded cruise line stock is sinking today. The pair of analyst price-target cuts that Royal Caribbean stock suffered on Tuesday is catching up to the cruisers today. 