Biohaven shares gave up nearly 15% in a single session on September 10, 2026 following the FDA's partial clinical hold on new-patient enrollment in the BHV-7000/opakalim epilepsy trials NEW YORK, Sept. 11, 2026 /PRNewswire/ -- Biohaven Ltd (NYSE: BHVN) dropped $2.21, or about 14.73%, on...