Why Is Ionis Pharmaceuticals $IONS Stock Down -22.58% Today? (Find out why any stock moved today on Tickeron.) • IONS shares tumbled roughly 22.6% on Monday af

Why Is Ionis Pharmaceuticals $IONS Stock Down -22.58% Today? (Find out why any stock moved today on Tickeron.) • IONS shares tumbled roughly 22.6% on Monday after the company slashed full-year revenue guidance for its key drug Tryngolza. • The primary catalyst was a sharp cut to 2026 Tryngolza (ol…