TheStreet's Adam Feuerstein answers reader questions about biotech stocks.
In addition to Sage Therapeutics, also moving biotech Friday: Novavax, Cytokinetics and Acadia Pharmaceuticals.
Depression represents a huge commercial market opportunity. It's also a disease in which drugs that show impressive results in early studies routinely flame out before reaching the finish line.
Sage Therapeutics, Immunomedics and Myriad Genetics were among the premarket biotech stock movers on Monday.