Artificial-intelligence stocks led markets today as Amazon announced a US$38 billion, seven-year infrastructure pact with OpenAI to provide cloud services via Amazon Web Services (AWS) for the latter’s AI workloads. The announcement drove tech shares higher, particularly in AI and cloud infrastructure segments, while broader sectors under-performed. Experts say the agreement underscores the enterprise pivot toward large-scale generative-AI use and may trigger further infrastructure investment across hyperscalers.