Stock Markets September 9, 2026 10:35 AM

Broad Market Movers: Dell, AMD and Others Drive Midweek Stock Swings

Major technology and smaller-cap names lead gains while select industrial and financial stocks pull back

By Derek Hwang
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DELL ARM AMD GE SNDK

Stocks across market-cap ranges showed notable intraday moves on Wednesday. Technology names such as Dell Technologies, AMD and Arm were among the gainers in the mega-cap cohort, while some industrial and investment vehicles, including General Electric and Pershing Square Inc, posted declines. The session also featured large moves among mid- and small-cap companies, with several stocks reacting to guidance, earnings beats, and analyst actions.

Broad Market Movers: Dell, AMD and Others Drive Midweek Stock Swings
DELL ARM AMD GE SNDK
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Key Points

  • Technology mega-caps led gains on Wednesday, with Dell, Arm and AMD among the top performers.
  • Large- and mid-cap groups showed mixed activity: Sunbelt Rentals and Marvell climbed while General Electric and Pershing Square declined.
  • Small-cap names produced some of the largest percentage moves, with several biotech and niche-technology stocks posting double-digit swings.

Wednesday's trading session produced a broad set of winners and losers across market-cap segments. Movements ranged from modest gains among established technology names to sharp declines in several mid- and small-cap issues. Below are the leading movers organized by market-cap category followed by a real-time snapshot of additional ticker-level moves.


Mega-Cap Movers (Market Cap: $200 billion+)

  • Dell Inc (DELL) +4.3%
  • Arm (ARM) +3.3%
  • Adv Micro Device (AMD) +3.07%
  • General Electric (GE) -3.31%
  • SanDisk Corp-Exch (SNDK) +2.81%

Large-Cap Stock Movers (Market Cap: $10-$200 billion)

  • Sunbelt Rentals Holdings (SUNB); Sunbelt Rentals stock rises 3% on raised guidance, strong Q1 beat +9.2%
  • Marvell Technology Group Ltd (MRVL) +5.51%
  • Akamai Technologies Inc (AKAM) +3.97%
  • Chime Financial (CHYM); Loop Capital initiates Chime Financial stock with buy rating +6.33%
  • Caseys General (CASY); Casey’s General Stores slide 7% despite Q1 earnings beat -16.77%
  • Pershing Square Inc (PS) -7.72%

Mid-Cap Stock Movers (Market Cap: $2-$10 billion)

  • ServiceTitan (TTAN); ServiceTitan falls 18% on weak guidance following mixed Q2 -31.61%
  • The Bancorp (TBBK) -21.39%
  • Signet Jewelers Limited (SIG) +19.46%
  • Aehr Test Systems (AEHR) +8.37%
  • BKV (BKV) -9.77%

Small-Cap Stock Movers (Market Cap: $300 million - $2 billion)

  • Rexahn Pharmaceuticals Inc BATS (IRD) +42.63%
  • Oddity Tech (ODD); Oddity Tech stock surges 24% on earnings beat, improved outlook +17.62%
  • D Boral ARC Acquisition I (XLAB) +13.71%
  • Flotek Industries Inc (FTK) +9.83%
  • METU NASDAQ (METU) +9.11%
  • Investors Real Es (CSR) +9.06%
  • Tyra Biosciences (TYRA) -22.28%
  • Histogenics Corp (OCGN) -13.53%

Real-time ticker snapshot

Additional intraday readings and alternate data points reported during the session included: DELL +3.64%, SNDK +3.05%, AKAM +4.52%, MRVL +5.54%, GE -2.96%, AMD +3.05%, AEHR +7.73%, CASY -16.48%, CSR +9.22%, TBBK -24.15%, FTK +9.77%, SIG +19.1%, OCGN -15.41%, TYRA -22.07%, ODD +17.93%, ARM +2.79%, METU +9.8%, BKV -8.52%, TTAN -30.37%, CHYM +5.04%, XLAB +10.37%, SUNB +9.87%, PS -8.28%.


The session illustrated divergent sector activity: technology and certain specialty equipment names posted gains, while selected industrials and financial or investment-related stocks weakened. Several moves referenced company-issued guidance, quarterly results, or analyst coverage as the proximate catalysts listed in the trading updates above.


Data notes

The lists above compile reported intraday percentage moves and the descriptive notes that accompanied certain tickers during the session. Where multiple intraday snapshots were available, both the categorized mover lists and the real-time snapshot entries are included to reflect the different reported readings from the trading day.

Risks

  • Company guidance can trigger sharp share-price reactions, as illustrated by ServiceTitan's noted drop tied to weak guidance affecting the technology and software services sector.
  • Earnings outcomes do not always prevent share declines; Casey's General Stores fell despite an earnings beat, indicating potential execution or outlook concerns in the retail sector.
  • Concentrated volatility in small-cap and biotech names creates uncertainty for investors seeking stability, given several large percentage moves in that group.

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