Abivax (NASDAQ:ABVX) ADS gain $2.3B after obefazimod safety news; Paris session yet to start
Abivax S.A. is set for a lagged Paris opening after its U.S. ADS jumped in after-hours trading. Investors reacted to new clinical data on obefazimod, Abivax’s ulcerative colitis drug. The latest news hits late, but the drop earlier this month wasn’t about whether the drug works. It was about the potential cancer risk and what that could mean for the drug’s label. Abivax put out the release at 22:05 CEST, after Euronext Paris had already closed for the day at 17:30 and just past the U.S. market close. Euronext Paris trades from 9:00 a.m. to 5:30 p.m. local time and, according to its 2026 holiday calendar, June 30 isn’t a holiday.