Carnival Corporation (CCL) - Get Report reports 2016 fourth quarter earnings on December 20. The company is expected to post earnings of $0.59 a share on sales of $3.9 billion, according to FactSet. During the same quarter a year ago, Carnival reported earnings of $0.50 per share and sales of $3.7 billion. Investors will be looking for commentary on how rising oil prices may impact the cruise line's profitability in 2017, especially amid the recent OPEC production cuts, which is expected to lift oil prices. TheStreet's Scott Gamm reports from Wall Street.