The Clear Reason Alkermes Plc's Shares Jumped by as Much as 12%

Shares of Alkermes (NASDAQ: ALKS), an Irish-based commercial-stage drug developer with a focus on central nervous system medicines, jumped by as much as 12% during Thursday's trading session and ultimately ended the day higher by 11%. The reason for the volatile day, which at one point saw Alkermes shares lower by 5%, was the release of its third-quarter operating results.

A topsy-turvy day for Alkermes was highlighted by an earnings report that seemed to head in opposite directions at times.

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Source: Fool.com