Stock Markets July 24, 2026 10:35 AM

Market Movers Friday: SanDisk, Micron Slip While Select Names Rally on Upgrades and Beats

A mixed session saw large-cap declines in memory names and sharp gains among real estate, insurance and cloud communications stocks

By Ajmal Hussain
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Friday's trading session produced pronounced swings across market-cap tiers. Memory and semiconductor-related names such as SanDisk and Micron recorded notable declines, while select large- and mid-cap stocks rallied following analyst upgrades and quarterly results that topped expectations. Small-cap performers included a sharp advance in an insurance stock and mixed reactions among specialty and biotech names.

Market Movers Friday: SanDisk, Micron Slip While Select Names Rally on Upgrades and Beats
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Key Points

  • Memory and semiconductor names including SanDisk (SNDK) and Micron (MU) were among the largest mega-cap decliners for the session.
  • Analyst upgrades and quarterly beats drove double-digit rallies for specific large- and mid-cap names, notably Digital Realty (DLR) and RingCentral (RNG).
  • Small-cap performance was mixed, with Safety Insurance (SAFT) posting a very large gain and other specialty names moving on earnings results.

Market overview

Friday's action featured a broad range of moves across mega-, large-, mid- and small-cap names. The session was characterized by sharp downside in several memory and chip-related issues, offset by double-digit advances tied to earnings beats and analyst upgrades in other sectors. Below is a categorized review of the largest percentage movers referenced during the session.


Mega-cap movers (Market cap: $200 billion and higher)

  • SanDisk Corp-Exch (SNDK): -8.1%
  • Micron Tech (MU): -5.77%
  • American Express (AXP): -6.17%
  • Intel Corp (INTC): -3.15%
  • Advanced Micro Devices (AMD): -2.34%

These declines were concentrated among memory, payments and core semiconductor names, with the largest percentage moves in SanDisk and Micron within the mega-cap group.


Large-cap stock movers (Market cap: $10-$200 billion)

  • Digital Realty Trust Inc (DLR): +14.03% - TD Cowen upgraded the stock citing demand strength.
  • SS&C Technologies (SSNC): +10.18% - reported a Q2 earnings and revenue beat and guided above consensus.
  • Schlumberger Ltd (SLB): +9.59%
  • Yandex (NBIS): -10.53%
  • Tower Semiconductor (TSEM): -8.73%
  • Vicor Corp (VICR): -8.71%
  • Summit Therapeutics PLC (SMMT): -7.84%

Within the large-cap cohort, gains were driven by an analyst upgrade for a data center REIT and company-specific beats, while several technology and specialty names moved lower.


Mid-cap stock movers (Market cap: $2-$10 billion)

  • RingCentral Inc (RNG): +22.13% - stock rose after reporting a Q2 beat and raising guidance.
  • Booz Allen Hamilton Holding Corp (BAH): +14.85% - shares rose on an earnings beat despite a revenue decline.
  • Enova International Inc (ENVA): +8.98%
  • MaxLinear Inc (MXL): -17.06% - fell despite posting a solid Q2 beat.
  • MUU (MUU): -13.18%
  • Applied Optoelectronics (AAOI): -9.79%
  • RXO Inc (RXO): -8.5%

Mid-cap moves were led by outsized strength in cloud communications and government contracting names following earnings-related news, while several semiconductor and industrial suppliers registered steep drops.


Small-cap stock movers (Market cap: $300 million - $2 billion)

  • Safety Insurance (SAFT): +41.31%
  • World Acceptance (WRLD): +14.74% - beat profit estimates despite a revenue miss.
  • World Fuel Services (WKC): +11.44% - surged on a strong Q2 beat and raised guidance.
  • Phoenix Asia Holdings (PHOE): -10.56%
  • KemPharm Inc (ZVRA): -20.73%
  • RAM (RAM): -3.48%

Small-cap action included a very large percentage gain for an insurance company and mixed results across specialty finance, fuel services and biotech names.


Additional intra-session data points

The session included multiple supplemental percentage figures cited throughout the trading update, including a series of repeated and condensed percentage values that tracked many of the same tickers: INTC -3.68%, SNDK -8.57%, MU -6.02%, AXP -6.56%, AMD -2.67%, SLB +9.59%, TSEM +4.7%, SAFT +41.34%, SSNC +10.14%, VICR -9.31%, WRLD +19.83%, BAH +15.00%, DLR +13.97%, MXL -16.97%, WKC +11.00%, RNG +23.33%, AAOI -9.22%, YDEX +5.01%, ENVA +9.38%, SMMT -8.58%, ZVRA -21.33%, RXO -8.46%, PHOE -9.3%, RAM -15.09%.


What sectors were most affected

  • Semiconductors and memory - several large moves to the downside among mega- and mid-cap chip names.
  • Real estate and cloud communications - notable upside tied to an upgrade and earnings beats.
  • Insurance and fuel services - small-cap gains driven by company-specific results.

Context and caveats

The listed moves reflect intra-session percentage changes and company announcements mentioned in the session overview. Some tickers and percentage figures were repeated in condensed form during the update; readers should note that a number of entries appeared multiple times with closely similar but not always identical percentage values.

Risks

  • Concentrated downside in semiconductors and memory names could signal sector-specific volatility affecting tech and hardware suppliers.
  • Earnings-driven moves show that company-specific results and guidance can produce sharp short-term swings across market-cap tiers.
  • Repeated and condensed intra-session figures indicate potential variation in reported percentages; traders should confirm final reported results and prices before making decisions.

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