Cruise stocks extend plunge after CDC lengthens no-sail order through September

· *Cruise stocks slumped in Friday morning trading, continuing a downturn after the CDC extended its no-sail order through September 30.*
· *Royal Caribbean fell as much as 4.5%, while Carnival and Norwegian Cruise Line dropped 2.9% and 3.8%, respectively. All three companies sank at least 7% in Thursday's session.*
· *The...