Investors didn’t respond well to the U.S. FDA’s briefing document for the March 30 advisory committee meeting on Amylyx Pharmaceuticals Inc.’s amyotrophic lateral sclerosis (ALS) candidate. Shortly after the materials for the adcom were posted Monday, Amylyx (NASDAQ:AMLX) dropped from a morning high of $25.68 per share to an all-time low of $10.49 in the heaviest trading since the company went public in January. With share volume exceeding 15 million, Amylyx rebounded somewhat, ending the day at $16.01, down nearly 36% from its March 25 close of $25.