Nvidia and Amazon stocks rose premarket Wednesday, driven by AI-related developments, while Palo Alto Networks fell after trimming profit forecasts. Investors reacted to mixed signals from corporate earnings and Fed policy updates. Nvidia's 2.2% gain followed a multi-year AI chip deal with Meta, highlighting its pivotal role in powering tech giants' infrastructure.

Meanwhile, Palo Alto Networks plummeted 6.1% after cutting its annual outlook, citing integration costs from acquisitions aimed at bolstering AI capabilities. Amazon's 1.7% climb stemmed from Bill Ackman's Pershing Square increasing its stake by 65%, making it the e-commerce giant's third-largest holding. New York Times shares jumped 3.4% after Berkshire Hathaway disclosed a $350 million investment, signaling institutional confidence in media resilience. Other movers included Cadence Design Systems (up 7.3% on AI tool demand) and Riot Platforms (up 5.7% after investor pressure for AI/HPC focus).