Stock Market Movers: 10 Biggest Gainers and Losers – 19 October 2026

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Monday’s 10 Biggest Losers

10. MOS: The Mosaic Company (MOS) tumbles 4.89% as Q3 earnings loom.

9. TLK: Telkom Indonesia (TLK) dips 5.26% as MSCI warns of exclusion of Indonesia from its indices.

8. MPT: Medical Properties Trust (MPT) falls to 52-week low, ending 5.32% lower on lack of catalysts to boost buying.

7. RUN: Sunrun Inc. (RUN) sheds 5.62% on investor pessimism ahead of Q3 earnings.

6. FRVO: Fervo Energy (FRVO) drops 5.99% on lingering investor pessimism triggered by a short seller report claiming that it failed to disclose existential issues.

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