Stock Market Movers: Biggest Losers and Gainers on 21 October 2026

2. TAL: TAL Education Group (TAL) extends decline to 4th day, loses 8.89% ahead of Q3 earnings next week.

1. RCUS: Arcus Biosciences (RCUS) nosedives 19.58% as investors sour on dilution potential of planned share sale.

TOP GAINERS

10. OKTA: Okta Inc. (OKTA) climbs 7.54% on broader market optimism.

9. MSTR: Strategy Inc. (MSTR) jumps 7.54% as Bitcoin rebounds.