Shares of Carnival (NYSE:CCL) are up 9% in midday trading Wednesday while Norwegian Cruise Line (NYSE:NCLH) is rallying 11%. Royal Caribbean Cruises (NYSE:RCL) isn’t joining the party, with RCL stock only up 2% on the session. The divergence is the story. All three cruise names have been pummeled over the past month, with CCL stock ... Carnival Jumps 9%, Norwegian Cruise Line Soars 11%: Why Royal Caribbean Isn’t Joining the Cruise Party