Markets & Economy Here’s Why Ionis Pharmaceuticals’ Steep Sell-off Was Overdone September 3, 2026 · 9:04 am 1 sources Image: Yahoo Finance ad slot · in-content video 16:9 Coverage More coverageHere's Why Ionis Pharmaceuticals' Steep Sell-off Was OverdoneYahoo Finance · September 3, 2026 09:04