Provectus Biopharmaceuticals (PVCT 1.24%) resumed trading today, but shareholders probably wished it was still frozen from last Friday. Shares collapsed a startling 63% on news that the FDA would not grant a breakthrough designation to Provectus' melanoma drug PV-10.

In this episode of Market Checkup, The Motley Fool's health-care-focused investing show, analysts David Williamson and Michael Douglass discuss the controversy surrounding Provectus, the increasing competition for its mid-stage drug, and whthere the stock is a bad news buy.

Watch and find out.