Stock Market Movers: Best and Worst Performers of 15 October 2026

2. OPK: OPKO Health (OPK) rockets 17.52% higher on $872M sale of select assets to Labcorp.

1. VSTM: Verastem Inc. (VSTM) soars 19.71% as Mizuho, RBC Capital reiterate outperform rating over strong clinical trial of treatment candidate for cancer.

Worst Performers

10. DHT: DHT Holdings (DHT) sheds 6.09% on profit-taking following the previous days’ surge over higher tanker rates.

9. FRVO: Fervo Energy (FRVO) extends losing streak to 7th day, slashes 6.22% on investor pessimism and a new class action lawsuit triggered by a short-seller report that it allegedly failed to disclose existential issues.