🔴 Amgen is trading 20.3% down today following a sharp after-hours selloff with no clear catalyst

Amgen is trading at $291.77 (-20.34%) in after-hours trading following a sharp selloff that appears unexplained by current news flow.

• The stock plummeted from its regular session close of $366.29, significantly decoupling from broader market declines in the S&P 500 (-1.03%) and Nasdaq (-1.52%).
• No fresh company-specific announcements or regulatory filings have been released to account for the magnitude of the move.
• The company's most recent major update was the July 16 report on its MariTide obesity drug, which does not serve as an obvious catalyst for tonight's price action.