Norwegian Cruise Line (NCLH) shares were down 5% to $16.50, Carnival (CCL) shares were down 4% to $25.65, and Royal Caribbean Group (RCL) shares were down 3% to $290.76 as of midday Thursday. With no company-specific news this week, the market attributed this to macro factors, as fuel costs directly impact cruise line profits. WTI crude oil prices reached $86.58 on Tuesday, up 2% from the previous week and 3.7% from the previous month.