Big Tech Adds $420 Billion in Market Value as Regulatory and AI Developments Reshape Wall Street

U.S. markets witnessed a rare surge as eight of the largest tech companies collectively added $420 billion in market value over just three days. The rebound was fueled by a favorable antitrust ruling for Google and AI-driven momentum across the sector.

Judge Amit Mehta's decision in the Google antitrust case sent shockwaves through markets, with Alphabet shares jumping 9% in a single session. The ruling avoided drastic measures, requiring only limited data sharing with competitors—a win for Big Tech's dominance. Apple similarly benefited from its entrenched search partnership with Google.

While Nvidia and Microsoft saw pullbacks, Tesla defied trends with a rebound tied to Elon Musk's compensation plan and AI ambitions. The rally underscores how regulatory outcomes and artificial intelligence breakthroughs now dictate market movements.