Citi has expressed optimism about Norwegian Cruise Line (NCLH, Financial) and Royal Caribbean (RCL), resulting in pre-market gains for both companies. Norwegian Cruise Line surged nearly 4% and Royal Caribbean rose over 2% in pre-market trading. Other cruise stocks, including Carnival Cruise Line (CCL) and Viking Holdings (VIK), also experienced pre-market increases. Citi upgraded Norwegian Cruise Line from a "neutral" to a "buy" rating, highlighting its potential for substantial earnings growth and multipl ...