** Shares of drug developer Biohaven Ltd BHVN.N fall 14.4% to $39.02 premarket
** BHVN says its experimental drug, taldefgrobep alfa, did not meet the main goal of improving muscle function in patients with a rare neuromuscular disorder called spinal muscular atrophy in a late-stage study
** Taldefgrobep alfa is designed to block myostatin, a protein that limits muscle growth, which helps increase muscle mass and improve muscle function
** However, the drug showed positive effects on body composition, such as reducing fat mass, supporting its potential as an obesity treatment, co says
** As of last close, stock has risen 6.5% YTD
(Reporting by Kamal Choudhury in Bengaluru)
((Kamal.Choudhury@thomsonreuters.com;))
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