Why Sage Therapeutics Gained 70% Today

Shares of Sage Therapeutics (NASDAQ: SAGE), a clinical-stage biotech, took flight today, after the company announced positive mid-stage trial results for its moderate-to-severe major depressive disorder (MDD) treatment, dubbed "SAGE-217."

According to the company, SAGE-217 produced a highly significant mean reduction in the Hamilton Rating Scale for Depression among patients taking the drug, compared with those receiving a placebo. The drug was also reportedly well tolerated, with only a handful of patients discontinuing its use because of adverse side effects. Sage's shares ended the day higher by a noteworthy 70% on nearly 10 times the average daily volume as a result of this clinical update.

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Source: Fool.com