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

BIGGEST LOSERS

10. COTY: Coty Inc. (COTY) sheds 5.13% ahead of Q1 2027 earnings.

9. OPEN: Opendoor Technologies (OPEN) decreases 5.34% on concerns as Lucas Matheson resigns as president effective immediately.

8. NFLX: Netflix Inc. (NFLX) dips 5.41% on slowing growth.

7. CELH: Celsius Holdings (CELH) declines 5.51% ahead of Q3 earnings.

6. XPEV: XPeng Inc. (XPEV) drops 5.55%, trading sideways ahead of updates on October deliveries.

5. DXCM: DexCom (DXCM) extends losing streak to 4th straight day, shedding 6.39% ahead of next week’s Q3 earnings.

4. HSAI: Hesai Group (HSAI) drops 5.72% ahead of Q3 earnings.

3. T: AT&T Inc. (T) loses 6.45% on price target cut from JPMorgan over competition concerns.

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.

8. SPCX: SpaceX (SPCX) rallies 7.79% on swing to profitability. Q3 profits hit $4.4B as revenues soar 161%.

7. APLD: Applied Digital (APLD) jumps 8.54% on resumed bargain-hunting and renewed optimism for AI stocks.

6. EROC: ERock (EROC) snaps 3-day losing streak with 8.79% jump on broader market optimism.

5. SMCI: Super Micro Computer (SMCI) extends winning streak for 4th day, climbs 9.55% on higher revenue growth forecast.

4. NTSK: Netskope Inc. (NTSK) extends rally for 3rd day, surges 10.04% on cybersecurity stocks rally.

3. ABSI: Absci Corp. (ABSI) extends rally to 3rd day, up 10.69% as Keybanc maintains overweight rating, hikes price target to $20—double its current stock price.

2. SKYD: Skydance Corp. (SKYD) soars 10.85% on speculation of a SpaceX-Skydance potential partnership.

1. ASST: Strive Inc. (ASST) climbs 13.64% on announcement of first cash dividends on 15% Series A perpetual preferred shares.