Stock Markets June 16, 2026 02:01 PM

Stocks See Wide Swings; SpaceX, Moderna Rally While Intel and Planet Labs Slip

Broad market action produces large gains in select technology and biotech names alongside steep declines in several chip and small-cap names

By Marcus Reed
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Trading on Tuesday produced notable moves across market-cap tiers, with SpaceX and Moderna among the strongest gainers while Intel and Planet Labs were among the larger decliners. Gains were concentrated in select technology, biotech and small-cap names, while semiconductors and several mid-cap industrials showed weakness. The list below catalogs the largest movers by market-cap category and reiterates discrete corporate headlines that accompanied some of the moves.

Stocks See Wide Swings; SpaceX, Moderna Rally While Intel and Planet Labs Slip
SPCX WDC INTC KLAC MRVL
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Key Points

  • SpaceX and Moderna were among the largest gainers on Tuesday, each posting double-digit percentage increases.
  • Semiconductor and certain communications equipment names, including Intel, KLAC, MRVL and others, recorded meaningful declines.
  • Small-cap securities produced some of the most extreme moves, with WhiteFiber up over 22% and Veraxa Biotech down more than 50%.

Equity markets on Tuesday registered a mix of sharp rallies and significant pullbacks across market-cap segments. Several large-cap and small-cap stocks posted double-digit percentage moves, with corporate announcements and company-specific developments highlighted alongside straight price action.


Mega-cap movers (market cap: $200 billion USD or higher)

  • SpaceX (SPCX) +10.02%
  • Western Digital (WDC) +6.93%
  • Intel Corp (INTC) -5.73% - note: Mobileye to launch owned robotaxi service in U.S. city in 2027
  • Kla-tencor Corp (KLAC) -5.37%
  • Marvell Technology Group Ltd (MRVL) -4.73%
  • Adv Micro Device (AMD) -4.86%
  • Netflix, Inc. (NFLX) -4.67%
  • Micron Tech (MU) -3.56%
  • SanDisk Corp-Exch (SNDK) -3.39%
  • Avago Technologies (AVGO) -3.59%

The mega-cap list shows both notable rallies, such as an over 10% gain in SpaceX, and declines among several semiconductor and media names.


Large-cap movers (market cap: $10-$200 billion USD)

  • CoreWeave (CRWV) +11.43% - CoreWeave achieves fastest DeepSeek-V3 training in MLPerf test
  • Moderna (MRNA) +10.07% - Moderna expands Hoge’s role, names Banque commercial chief
  • Talen Energy Corp (TLN) +7.62%
  • Roblox Corp (RBLX) +6.2% - Roblox launches age-based accounts globally for users under 16
  • CBOE Holdings Inc (CBOE) +2.63%
  • Planet Labs PBC (PL) -8.78%
  • Applied Opt (AAOI) -8.16%
  • Lumentum Holdings Inc (LITE) -7.77%
  • Ciena (CIEN) -6.26%
  • Nova Measuring In (NVMI) -5.69%

Within the large-cap cohort, CoreWeave and Moderna were among the top performers, with Planet Labs and several optical and communications companies posting notable drops.


Mid-cap movers (market cap: $2-$10 billion USD)

  • Innodata Isogen (INOD) +10.43%
  • Lionsgate Studios Holding (LION) +12.11% - Lionsgate Studios on Watch Amid Takeover Chatter
  • Eos Energy (EOSE) +9.72% - Eos Energy starts production at second battery line in Pennsylvania
  • Rubicon Pro (MGNI) +7.97%
  • Bitfarms OTC (KEEL) +8.92%
  • Huntsman (HUN) -16.39% - Olin and Huntsman announce all-stock merger to form $12B company
  • AXT Inc (AXTI) -11.39%
  • Fundrise Innovation Fund (VCX) -11.64%
  • Miami International Holdings (MIAX) -9.11%
  • Inflection Point Acquisition (LUNR) -8.09%

Mid-cap action included several double-digit percentage moves in both directions, driven in part by corporate activity such as the announced merger affecting Huntsman and takeover chatter around Lionsgate.


Small-cap movers (market cap: $300 million - $2 billion USD)

  • WhiteFiber (WYFI) +22.28%
  • Certara Inc (CERT) +16.89%
  • Bull Horns (ZSQR) +15.9%
  • Sabre Corpo (SABR) +14.37%
  • Retail Value (RVI) +13.98%
  • Mobia Medical (MOBI) +18.53%
  • Veraxa Biotech (VRXA) -56.41%
  • AAOX (AAOX) -16.21%
  • LITX (LITX) -15.59%

Small-cap names showed some of the sharpest moves of the session, with WhiteFiber rallying more than 22% while Veraxa Biotech plunged by over half of its value on the day.


Market context and patterns

Together, the lists underscore a day of concentrated winners and losers. Technology and biotech names supplied several of the biggest percentage gains, while semiconductor and certain industrial names featured among the larger declines. The session included company-specific headlines, such as product or service launches and executive appointments, that accompanied moves for individual tickers.

Investors and market participants saw pronounced intraday volatility across multiple capitalization tiers, from mega-cap names through small-cap securities.

Risks

  • High intraday volatility across market caps creates increased trading and execution risk for investors in technology and small-cap stocks.
  • Significant declines in semiconductor and communications-equipment names may signal sector-specific pressure, which could affect related supply-chain and industrial exposures.
  • Large moves tied to single-company developments, such as mergers or product launches, increase idiosyncratic risk for affected mid-cap and large-cap names.

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