Amarin (AMRN -5.93%) is plunging more than 20% in after-hours trading, after disclosing that it will be hiring a sales force for its flagship drug Vascepa. Investors were hoping for a swift buyout, and tonight's late-breaking announcement may be a blow to that happening. Management insisted that all options are still on the table ahead of a potential NCE status update next week, but this is still widely seen as a blow to a buyout or partnership. Watch health-care analysts David Williamson and Max Macaluso discuss where this leaves Amarin investors in the following video.