Stock Markets August 14, 2026 10:37 AM

Broad market movers: Reddit, AMD gain while Applied Materials and KinderCare slide

Winners and losers span mega-caps to small-caps as earnings news and company-specific developments drive notable swings

By Marcus Reed
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SNDK AMD MU PANW AMAT

Stocks across market-cap tiers saw pronounced moves on Friday, with Reddit and AMD among the largest gainers and Applied Materials and KinderCare among the steepest decliners. Mid- and small-cap names showed acute reactions to earnings and guidance updates, while several technology-related issues influenced mega- and large-cap performance.

Broad market movers: Reddit, AMD gain while Applied Materials and KinderCare slide
SNDK AMD MU PANW AMAT
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Key Points

  • Major winners included Reddit (RDDT) and AMD, both posting double-digit and mid-single-digit gains respectively.
  • Earnings beats and raised guidance pushed mid- and small-cap names such as Heartflow (HTFL) and Eton Pharmaceuticals (ETON) sharply higher.
  • Significant declines were reported at both the mega-cap and small-cap levels, with Applied Materials (AMAT) and KinderCare (KLC) among the steepest losers.

Friday's trading session produced a varied set of outcomes across market-cap segments, with individual company news and investor reactions driving the most significant price swings. Gains were concentrated in some tech and small-cap names, while other areas registered sharp pullbacks.


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

  • SanDisk Corp-Exch (SNDK): +4.56%
  • Adv Micro Device (AMD): +4.42%
  • Micron Tech (MU): +1.86%
  • Palo Alto Netwrk (PANW): -1.9%
  • Applied Matls Inc (AMAT): -4.82%

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

  • Applied Opt (AAOI): +13.69%
  • Reddit (RDDT): +13.26%
  • Yandex (NBIS): +4.05%
  • Hecla Mining Comp (HL): +5.84%

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

  • Heartflow Inc (HTFL); Heartflow soars 15% on earnings beat, raised guidance: +34.67%
  • Aehr Test Systems (AEHR); Jefferies initiates Aehr Test Systems stock with buy rating on AI shift: +10.81%
  • AXT Inc (AXTI): +8.37%
  • Bullish Inc (BLSH): -9.06%

Small-Cap Stock Movers (Market Cap: $300M-$2B)

  • Eton Pharmaceuticals (ETON); Eton Pharmaceuticals soars 25% on earnings beat, raised guidance: +35.07%
  • Blackboxstocks NAQ (ALOY): +14.09%
  • TSS Inc (TSSI): -18.73%
  • Kindercare Learning Companies (KLC); KinderCare shares tumble 21% as center closures drive disappointing Q2 results, guidance: -36.9%

Movements this session were driven in part by company-specific catalysts: earnings beats and raised guidance propelled Heartflow and Eton Pharmaceuticals higher, while comments from analysts and strategic narratives influenced Aehr Test Systems. Conversely, Applied Materials and several companies at the small-cap end of the market recorded notable declines tied to disappointing results or operational challenges referenced in company disclosures.


Market takeaway

The session underscored the breadth of drivers affecting individual equities — from earnings beats and analyst actions to operational disruptions — resulting in large percentage moves across market-cap categories.

Risks

  • Company-specific operational issues and center closures can produce steep share price declines, as seen with KinderCare (KLC) - impacting consumer services and education-related equities.
  • Earnings and guidance volatility creates heightened downside or upside risk for mid- and small-cap stocks, exemplified by the large reactions in Heartflow (HTFL) and Eton Pharmaceuticals (ETON).
  • Analyst actions and thematic investment narratives, such as Jefferies' initiation on Aehr Test Systems (AEHR), can amplify price swings and contribute to market volatility in technology and specialty-equipment sectors.

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