TLDR
- Alphabet stock plunged more than 6% Monday following the departure of Nobel laureate John Jumper from Google DeepMind to competitor Anthropic
- The move triggered widespread selling across major technology stocks, with the Nasdaq sliding approximately 1%
- Amazon, Meta, and Microsoft each declined 2% or more in sympathy trading
- Alphabet faced a potential record-breaking single-day market capitalization loss of nearly $299 billion
- The S&P 500 declined 0.3% while the Dow Jones Industrial Average gained 0.4%
Alphabet experienced a dramatic selloff Monday following reports that a prominent artificial intelligence researcher departed Google’s DeepMind division for competing AI startup Anthropic.
The researcher in question is John Jumper, a distinguished senior research scientist and recent Nobel Prize recipient. The announcement initially emerged Friday when U.S. equity markets were closed for a federal holiday.
Major Tech Stocks Follow Alphabet Lower
Alphabet shares plummeted over 6% during Monday’s trading session. The stock decline put the technology giant on track to erase approximately $299 billion in market capitalization. If realized, this would mark the company’s most severe single-session loss ever recorded and rank as the fifth-largest one-day market cap evaporation for any publicly traded U.S. corporation, based on Dow Jones Market Data analysis.
The downturn rippled throughout the technology sector. Amazon, Meta Platforms, and Microsoft each suffered losses exceeding 2%. Only Tesla and Apple among the so-called Magnificent Seven managed to post gains for the session.
The Roundhill Magnificent Seven ETF tumbled 1.7%. The iShares Expanded Tech-Software Sector ETF retreated 1%. However, the iShares Semiconductor ETF defied the broader trend, advancing roughly 2%.
Mixed Performance Across Major Indices
The tech-heavy Nasdaq Composite declined approximately 1% during Monday’s session. The S&P 500 registered a modest 0.3% decrease. Meanwhile, the Dow Jones Industrial Average, which doesn’t count Alphabet among its components, climbed about 183 points, translating to a 0.4% gain.
Investors also monitored developments in U.S.-Iran diplomatic discussions. Iranian officials announced Monday that negotiations in Switzerland had yielded “encouraging progress,” with parties agreeing to establish a framework for reaching a comprehensive agreement within a 60-day timeframe.
This diplomatic advancement helped alleviate concerns surrounding President Trump’s recent warnings of potential military action should Iran fail to restrain Hezbollah’s operations targeting Israel.
Oil prices retreated on the diplomatic developments. Brent crude declined roughly 3% to settle just above $77 per barrel. West Texas Intermediate crude dropped to approximately $73 per barrel.
Separately, former Federal Reserve Chairman Alan Greenspan passed away at age 100. Greenspan served as Fed chair for nearly 20 years.
Market participants are anticipating the May release of the Personal Consumption Expenditures price index. This inflation gauge will provide critical insights as the Federal Reserve continues its cautious approach toward interest rate policy.
In South Korea, SK Hynix surpassed Samsung to claim the title of the nation’s most valuable publicly traded company, underscoring robust demand in the memory chip industry driven by artificial intelligence expansion.
SpaceX stock declined for the third consecutive session, contributing additional pressure to the technology sector.
Jumper’s transition to Anthropic represents the most recent development in fierce competition among leading technology companies vying for elite AI research talent.
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