Stock Markets May 7, 2026 10:32 AM

Broad Swings in Stocks See Tesla, Microsoft Climb as Arm and SanDisk Pull Back

Mega-caps, mid-caps and small-caps register notable moves after company news, earnings and analyst actions

By Avery Klein TSLA MSFT ARM SNDK

Markets on Thursday produced a wide range of outcomes across market-cap tiers. Large technology names such as Tesla and Microsoft pushed higher, while chip designer Arm and storage name SanDisk were among the larger decliners. Movers spanned mega-cap heavyweights, large- and mid-cap technology and industrial names, and several small-cap stocks responding to analyst upgrades, earnings, and corporate announcements.

Broad Swings in Stocks See Tesla, Microsoft Climb as Arm and SanDisk Pull Back
TSLA MSFT ARM SNDK

Key Points

  • Technology and enterprise software names posted substantial gains while several semiconductor and energy names declined.
  • Movers spanned all market-cap tiers, with specific catalysts including earnings, guidance changes, certifications, analyst upgrades and potential acquisitions.
  • Small-cap and mid-cap stocks showed high volatility tied to event-driven news such as trial data and takeovers.

U.S. equities on Thursday exhibited pronounced divergence, with certain technology and enterprise-software names gaining sharply while a number of chipmakers, energy names and consumer companies retreated. Price responses were driven by a mix of corporate announcements, quarterly results, analyst actions and acquisition-related news.


Summary of the day

  • Tesla (TSLA) and Microsoft (MSFT) were among the notable advancers.
  • Arm (ARM) and SanDisk (SNDK) recorded significant declines among the largest-cap names.
  • Across market-cap tiers, winners and losers were tied to a range of company-specific developments including earnings, guidance, certifications and potential M&A activity.

Mega-Cap Movers (Market Cap: $200 billion USD or higher)

  • Arm (ARM); -7.42%
  • SanDisk (SNDK); -2.20%
  • Lam Research (LRCX); -2.08%
  • Chevron (CVX); -2.93%
  • Exxon Mobil (XOM); -2.87%
  • Texas Instruments (TXN); -2.54%
  • GE Vernova (GEV); -1.87%
  • Palantir Technologies (PLTR); Palantir to join U.S. Army hackathon on system integration; +3.29%
  • Tesla (TSLA); +3.16%
  • Microsoft (MSFT); +2.42%

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

  • Datadog (DDOG); Datadog achieves FedRAMP High security certification; +28.71%
  • SiTime (SITM); Barclays upgrades SiTime stock rating on data center growth; +23.98%
  • Fortinet (FTNT); Fortinet surges 18% on strong Q1 results, raised guidance; +23.69%
  • Cognex (CGNX); +11.79%
  • MongoDB (MDB); +13.94%
  • Albemarle (ALB); Albemarle shares leap 6% on strong Q1 results, improved outlook; +11.32%
  • H & R Block (HRB); H&R Block beats estimates, raises outlook on market share gains; +22.71%
  • Zoetis (ZTS); Zoetis shares tumble on weak guidance and earnings miss; -19.50%
  • Insmed (INSM); Insmed stock falls 6% on Q1 beat as investors eye guidance; -16.88%
  • Coca-Cola Bottling (COKE); -16.19%
  • Regal Beloit (RRX); -10.39%

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

  • AAON (AAON); AAON soars 27% on earnings beat and raised guidance; +50.60%
  • Himax Technologies (HIMX); +41.44%
  • Xometry (XMTR); +35.24%
  • Warby Parker (WRBY); +28.63%
  • Fluence Energy (FLNC); Fluence Energy soars 32% on strong backlog, guidance; +34.07%
  • Cross Country (CCRN); Knox Lane to acquire Cross Country Healthcare for $437 million; +28.98%
  • Amprius Technologies (AMPX); -24.83%
  • Shake Shack (SHAK); Shake Shack names Michelle Hook as chief financial officer; -28.76%
  • Planet Fitness (PLNT); William Blair downgrades Planet Fitness stock rating on slower growth; -33.26%
  • Fastly (FSLY); Fastly shares tumble 22% despite topping Q1 estimates; -36.16%

The session also included a set of additional percentage moves reported across tickers, some reflecting intraday or alternate measures: CVX -2.78%, MSFT +2.7%, LRCX -2.13%, XOM -2.84%, HRB +23.5%, TXN -2.18%, TSLA +3.61%, AAON +50.14%, CCRN +29.28%, CGNX +12.29%, COKE -16.28%, FTNT +23.31%, HIMX +41.14%, INSM -17.47%, RRX -8.57%, ALB +9.91%, ZTS -21.58%, PAHC -19.56%, SHAK -28.2%, ELA +19.28%, PLNT -32.67%, MDB +13.76%, FSLY -38.88%, DDOG +30.62%, SITM +25.13%, VITL -24.33%, RXT +92.98%, PLTR +4.96%, AGL +100.34%, XMTR +37.95%, WRBY +26.71%, FLNC +34.81%, TRDA -54.9%, AMPX -26.27%, ARM -7.8%, GEV -1.99%.

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

  • agilon health (AGL); Jefferies upgrades agilon health stock rating on rate visibility; +96.28%
  • Rackspace Technology (RXT); +82.38%
  • Ethos Technologies (LIFE); +32.14%
  • Entrada Therapeutics (TRDA); Entrada Therapeutics to report phase 1/2 trial data Thursday; -55.24%
  • iShares Industrials Sector Bond (ENGN); -78.76%
  • Vital Farms (VITL); -25.54%
  • Amplify Snack Brands (BETR); -26.89%
  • DGSE Companies (ELA); +17.25%
  • Phibro Animal Health (PAHC); -19.02%

Key points

  • Sector effects were broad: technology and enterprise software stocks showed large upside moves tied to security certifications, earnings beats and analyst upgrades, while energy and semiconductor-related names were among those falling.
  • Movers included companies across market caps - from mega-cap platform names to volatile small-cap biotech and specialty industrials - indicating the market-wide nature of the days reactions.
  • Catalysts cited in movers included earnings beats and guidance changes, security certification, analyst upgrades, and acquisition or trial-data related news.

Risks and uncertainties

  • Guidance sensitivity: Several stocks moved significantly on quarterly results and guidance updates, highlighting exposure to future-earnings revisions across sectors such as technology, materials and consumer services.
  • Event-driven volatility: Small-cap names tied to clinical trial readouts or acquisition announcements displayed steep swings, indicating heightened risk for investors in biotech and micro-cap targets.
  • Mixed signals within sectors: Energy and semiconductor-related names showed declines even as other technology stocks rallied, underscoring sector-specific drivers and uneven performance within broader industry groups.

This report compiles the largest reported intraday moves across market-cap categories for Thursday based on company releases, analyst notes and other market reports. Movements reflect reported percentage changes and company-specific items noted above.

Risks

  • Future guidance revisions could alter recent share price reactions across technology, materials and consumer sectors.
  • Clinical trial readouts and acquisition announcements inject heightened volatility into small-cap biotech and healthcare-related equities.
  • Differing drivers within sectors mean some industry participants may continue to underperform even as peers rally, notably in energy and semiconductors.

More from Stock Markets

Qualcomm Rally Fueled by OpenAI Partnership Reports and Broadening Revenue Mix May 7, 2026 Six Flags Shares Jump After First-Quarter Beat, Operational Gains and Executive Moves May 7, 2026 Stroeer Shares Jump After Reports of Private Equity Interest May 7, 2026 Casablanca market edges lower as utilities, banks and mining lag; Moroccan All Shares slips 0.10% May 7, 2026 Bernstein Sees Continued Upside for Memory Stocks as DRAM and NAND Prices Jump May 7, 2026