Market Movers Stock Market Movers: 10 Biggest Gainers and Losers – 20 October 2026 By Angelica Ballesteros Published October 20, 2026 at 6:18 pm EDT Share << PrevPage 2 of 6Next >>See All 5. IREN: IREN Ltd. (IREN) down 4% on lingering concerns about borrowing for AI buildout.4. FPS: Forgent Power Solutions (FPS) falls 4.09% after analyst downgrade.3. GM: General Motors (GM) loses 6.84% on $20B buyback, lower growth outlook. Share << PrevPage 2 of 6Next >>See All