Why Is Agios Pharma Stock (AGIO) Down Today?

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2025.11.19 15:07
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Agios Pharma's stock dropped 28.27% after announcing mixed results from its Phase 3 RISE UP clinical trial for mitapivat in treating sickle cell disease. While mitapivat showed statistical significance in hemoglobin response, it failed to meet the endpoint for sickle cell pain crises. Despite positive trends and a favorable safety profile, the news led to heavy trading, with 3.9 million shares exchanged, far exceeding the average daily volume.