Why Did Regeneron Pharmaceuticals (REGN) Stock Drop Today?

Regeneron Pharmaceuticals (REGN) is back in focus after Biohaven entered a new clinical supply agreement to pair BHV-1530 with Regeneron’s cancer drug Libtayo in patients with solid tumors, with enrollment in the combination cohort already underway. Despite today’s pullback, with the share price down 4.54% over the past day to US$752.25 and weaker recent momentum, Regeneron Pharmaceuticals still carries a 90 day share price return of 20.64% and a 1 year total shareholder return of 34.84%...