Wall Street mixed as Alphabet drops, S&P 500 extends 9-day winning streak
U.S. stocks were mixed Tuesday, with the S&P 500 climbing for a ninth straight session even as Alphabet shares slid. The Dow Jones Industrial Average pushed higher while the Nasdaq pulled back from session highs. Market breadth remains a concern despite the streak, with analysts warning that narrow leadership could signal fragility beneath the surface.
Optical and semiconductor stocks posted outsized gains Tuesday, led by Coherent, Lumentum, and Broadcom. Alphabet's aggressive AI infrastructure spending is providing a tailwind for Broadcom, which supplies custom AI chips. Marvell Technology and Hewlett Packard Enterprise also moved sharply as investors rotated into AI-related hardware plays.
Former President Donald Trump signed an executive order Tuesday that requires developers of advanced AI models to submit them for national security vetting before public release. The order is viewed as scaled-back compared to earlier drafts, with critics arguing it lacks enforcement teeth and may be largely symbolic. Supporters say it establishes a baseline for AI oversight without stifling innovation.
The rapid, often confusing rollout of AI tools is frustrating workers and baffling staff at many organizations, the BBC reports. In the legal system, AI is flooding courts with pro se lawsuits, overwhelming judges and clerks who now face a surge of AI-generated filings. NPR notes that while AI has made legal filing accessible for those without lawyers, actual victories remain rare, and courts are struggling to cope.