Nvidia shares rose 0.2% to $190.28 on Monday, bucking declines in other U.S. AI megacaps amid renewed tariff uncertainty. Microsoft, Amazon, and Meta dropped between 2.1% and 2.9% in midday trading. Bridgewater estimates Alphabet, Amazon, Meta, and Microsoft will spend about $650 billion on AI infrastructure in 2026, up from $410 billion in 2025. Traders await Nvidia’s results for signs of AI demand and spending shifts.