Stock Market Movers: Biggest Losers and Gainers on 28 October 2026

5. CSGP: CoStar Group (CSGP) falls 13.96% on soft outlook.

4. SLS: Sellas Life Sciences (SLS) drops 14.71% on investor caution as firm hits 80th death to trigger analysis of Regal study.

3. LPLA: LPL Financial (LPLA) falls 15.23% as Commonwealth Retention falls short.