KPTI Stock Crashes 69% in After-Hours Trading

KPTI Therapeutics stock plummeted 69% during after-hours trading on August 22, 2026, marking a dramatic single-day collapse for the pharmaceutical company. The sharp decline signals significant market concern about the company’s prospects or recent developments. Investors are scrambling to understand the catalyst behind the massive sell-off. This represents one of the most severe after-hours drops in recent trading activity.

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