Why Replimune Stock Plummeted by Almost 40% Today

Core Viewpoint - Replimune's stock experienced a nearly 40% loss following a meeting with FDA officials regarding its cancer drug RP1, leaving the drug's future uncertain [1][4]. Group 1: Meeting Details - The meeting with the U.S. Food and Drug Administration (FDA) focused on Replimune's RP1, which is being tested as a combination therapy with Bristol Myers Squibb's Opdivo for advanced melanoma [2]. - The FDA had previously sent a complete response letter to Replimune in June, indicating that RP1 would not be approved, which surprised the company and its shareholders due to the drug's promising clinical results [3]. Group 2: Investor Reaction - Investors interpreted the neutral statement from Replimune regarding the future of RP1 as a sign that the program might be discontinued, leading to a significant sell-off of the stock [4].